This table is sorted by real viscosity (centiStokes), not by nominal weight. Note that the nominal weight is ... um... not really in the same order as the real weight.
The other interesting number is the Viscosity Index (VI), which is how stable the viscosity is over a wide temperature range. Bigger numbers are better. It doesn't just mean hot-day vs. cold day, it means begining of race vs. end.
| Brand / weight / model | nominal weight | Reported cSt @40C (centiStokes) | Reported cSt @100C (centiStokes) | Reported Viscosity Index (VI) | Recaclulated Viscosity Index (VI) | Viscosity/ Temperature Coefficient (VTC) | VT (cSt@40/cSt@100) | source | notes |
| Red Line (like water, Clear) | 1 | 5.50 | 2.3 | 344 | 343 | 0.58 | 2.39 | PVD | |
| Red Line (extra light, Blue) | 2.5 | 9.80 | 4 | 402 | 403 | 0.59 | 2.45 | PVD | |
| Spectro, Golden (ultra light) | - | 10.40 | 4.4 | 385 | 440 | 0.58 | 2.36 | PVD | |
| RockShox (2.5w Light cartridge (Torco 5) | 2.5 | 10.75 | 4 | 325 | 340 | 0.63 | 2.69 | PVD | |
| Torco RFF 5 | 5 | 10.75 | 4 | 325 | 340 | 0.63 | 2.69 | PVD | |
| Bel-Ray HVI (3 wt) | 3 | 11.00 | 3.85 | 296 | 297 | 0.65 | 2.86 | PVD | |
| Kayaba (K2-S shock) | - | 11.30 | 4 | 310 | 310 | 0.65 | 2.83 | PVD | |
| Showa Suspension Fluid SS-25 (2.5wt. Stock Shock, OEM) | 2.5 | 12.50 | 3.9 | 239 | 239 | 0.69 | 3.21 | PVD | |
| Silkolene Pro RSF (2.5wt) | 2.5 | 13.60 | 5.83 | 464 | 465 | 0.57 | 2.33 | PVD | |
| …hlins Shock Absorber Fluid No. 309 (#01306-01) | - | 13.70 | - | - | - | - | - | PVD | |
| Maxmia Racing Shock fluid (light, red) | 3 | 13.90 | 5.2 | 359 | - | - | 2.67 | Maxima | |
| Maxima Racing Shock Fluid (light, 3wt) | 3 | 14.00 | 5.2 | 378 | 370 | 0.63 | 2.69 | PVD | |
| Torco RSF Light (purple) | - | 14.50 | 4.7 | 288 | 286 | 0.68 | 3.09 | PVD | |
| PJ1 Cartridge Pro For Fluid (3.5 wt) | 3.5 | 14.60 | 3.6 | - | 134 | 0.75 | 4.06 | PVD | |
| Castrol Fork Oil (10wt) | 10 | 15.00 | 4 | 150 | 179 | 0.73 | 3.75 | PVD | |
| Motorex Racing Fork Oil (2.5w) | 2.5 | 15.10 | 4.2 | 200 | - | - | - | PVD | |
| RaceTech (Motorex) (Light US1) | 4.25 | 15.20 | 4.4 | 222 | 226 | 0.71 | 3.45 | PVD | |
| Kawasaki (KHL-15-10) | - | 15.30 | - | - | - | - | - | PVD | |
| Penske (lightweight shock fluid) | - | 15.50 | 6.3 | 434 | 434 | 0.59 | 2.46 | PVD | |
| Suzuki (Fork L01) | - | 15.50 | - | - | - | - | - | PVD | |
| Kayaba 01 (zero-One Fork) | - | 15.60 | 3.45 | 150 | 96 | 0.78 | 4.52 | PVD | |
| Yamaha 01 Fork oil (Kayaba) | - | 15.60 | 3.45 | 150 | 96 | 0.78 | 4.52 | PVD | |
| Showa Suspension Fluid SS-05 (Stock fork, OEM) | - | 15.65 | 3.6 | 116 | 113 | 0.77 | 4.36 | PVD | |
| Maxima Bicycle Fork fluid (5wt) | 5 | 15.90 | 3.51 | 150 | 98 | 0.78 | 5.53 | PVD | |
| Maxima Fork oil (5 wt) | 5 | 15.90 | 3.51 | 150 | 98 | 0.78 | 4.53 | PVD | |
| Maxima Racing Fork fluid (85/150, 5 wt) | 5 | 15.90 | 3.51 | 150 | 98 | 0.78 | 4.53 | PVD | |
| Motul Fork Oil (Very Light ) ?? | - | 16.00 | 3.5 | 100 | 95 | 0.78 | 4.57 | PVD | |
| Rockshox (5w Medium, Hydracoil) (Torco 7) | 7 | 16.10 | 5.05 | 285 | 280 | 0.69 | 3.19 | PVD | |
| Torco RFF 7 | 7 | 16.10 | 5.05 | 285 | 280 | 0.69 | 3.19 | PVD | |
| Motul Shock Oil (2.5-20) | - | 16.10 | 6.2 | 400 | 403 | 0.61 | 2.6 | PVD | |
| Maxima Racing Fork Fluid 85/150 (green) | 5 | 16.20 | 4.41 | 202 | - | - | 3.67 | Maxima | |
| Maxima Fork Oil | 5 | 16.20 | 4.41 | 202 | - | - | 3.67 | Maxima | |
| showa Suspension Fluid SS-07 (5wt) (Apolo) | 5 | 16.44 | 3.76 | 135 | 119 | 0.77 | 4.37 | PVD | |
| …hlins Front Fork Fluid (No. 5 #1305-01) | - | 16.50 | - | - | - | 0.28 | - | PVD | |
| Suzuki (Fork W-15) | - | 16.80 | - | - | - | - | - | PVD | |
| Spectro, Golden Spectro cartridge Fork Fluid (85/150 Very light) | - | 16.90 | 3.82 | 150 | 119 | 0.77 | 4.42 | PVD | |
| Honda Pro HP Fork Oil (5wt) | 5 | 17.00 | 3.8 | 140 | 115 | 0.78 | 4.47 | PVD | |
| Pro-Circuit PC-01 | - | 17.00 | 4.1 | - | 149 | 0.76 | 4.15 | PVD | |
| Bel-Ray Fork Oil (5 wt) | 5 | 17.10 | 4.1 | 146 | 147 | 0.76 | 4.17 | PVD | |
| Kayaba G5 | 5 | 17.70 | 3.5 | 72 | 72 | 0.8 | 5.06 | PVD | |
| Yamaha (Suspension G5) | 5 | 17.70 | - | - | - | - | - | PVD | |
| Kawasaki (Fork G5) | 5 | 17.90 | - | - | - | - | - | PVD | |
| ELF Moto Fork oil SYN (2.5) | 2.5 | 18.00 | 4 | 121 | 122 | 0.78 | 4.5 | PVD | |
| Motul Fork Oil, Comfort (Light, 5) | 5 | 18.20 | 4 | 124 | 119 | 0.78 | 4.55 | PVD | |
| Motul Fork Oil, Factory Line (Light, 5) | 5 | 18.30 | 4.2 | 138 | 138 | 0.77 | 4.36 | PVD | |
| Red Line (Light, Yellow) | 5 | 18.40 | 7.1 | 407 | 409 | 0.61 | 2.59 | PVD | |
| Agip Fork (2.5 wt) | 2.5 | 18.50 | 4.37 | 152 | 153 | 0.76 | 4.23 | PVD | |
| …hlins Front Fork Flulid (R&T 43, #1309-01) | - | 19.00 | - | - | - | 0.32 | - | PVD | |
| Bardahl (5w Fork Oil) | - | 19.30 | 5.1 | 212 | 212 | 0.74 | 3.78 | PVD | |
| Bel-Ray HVI (5wt) | 5 | 19.50 | 6.66 | 345 | 345 | 0.66 | 2.93 | PVD | |
| Torco RFF 10 | 10 | 19.90 | 5.7 | 260 | 256 | 0.71 | 3.49 | PVD | |
| Motul Fork Oil (Light)?? | - | 20.00 | 6 | 260 | 280 | 0.7 | 3.33 | PVD | |
| Showa Suspension Fluid SS-15 | - | 20.07 | - | - | - | 0.33 | - | PVD | |
| Maxima Racing Shock Fluid Medium (purple) | 7 | 20.76 | 7.28 | 338 | - | - | 2.85 | Maxima | |
| Spectro, SX "400" | - | 20.90 | 8.9 | 400 | 460 | 0.57 | 2.35 | PVD | |
| Maxima Racing Shock Fluid (Medium, 7wt) | 7 | 21.00 | 7.3 | 349 | 358 | 0.65 | 2.88 | PVD | |
| Spectro Fork Oil (5wt) | 5 | 21.60 | 4.4 | 119 | 114 | 0.8 | 4.91 | PVD | |
| Agip Fork (5wt) | 5 | 22.00 | 5.2 | 175 | 178 | 0.76 | 4.23 | PVD | |
| …hlins Front Fork Fluid (No. 10, #1310-01) | 10 | 22.00 | - | - | - | 0.37 | - | PVD | |
| Silkolene Fork Oil (5wt) | 5 | 22.30 | 4.4 | 106 | 107 | 0.8 | 5.07 | PVD | |
| Motul Fork Oil, Factory Line (Medium, 5-10) | 7.5 | 22.30 | 6.2 | 254 | 253 | 0.72 | 3.6 | PVD | |
| Motorex Racing Fork Oil (5w) | 5 | 22.60 | 5.6 | 200 | - | - | - | PVD | |
| Elf Moto Fork OIL SYN (5) | 5 | 23.30 | 4.8 | 130 | 129 | 0.79 | 4.85 | PVD | |
| PJ1 Fork Tuner (2.5wt) | 2.5 | 26.10 | 4.9 | - | 111 | 0.81 | 5.33 | PVD | |
| (Marzzochi) | - | 26.10 | 5.25 | 150 | 135 | 0.8 | 4.97 | PVD | |
| Spectro, Golden Spectro Cartridge Fork Fluid (125/150, Very Light) (Marzzochi) | - | 26.10 | 5.25 | 150 | 135 | 0.8 | 4.97 | PVD | what is this? |
| Spectro, Golden (Very Light) | - | 26.40 | 9.9 | 400 | 397 | 0.63 | 2.67 | PVD | |
| Maxima Racing Fork Fluid (125/150), 7wt) | 7 | 26.70 | 5.36 | 151 | 138 | 0.8 | 4.98 | PVD | |
| Silkolene Pro RSF (5wt) | 5 | 26.70 | 9.46 | 372 | 372 | 0.65 | 2.82 | PVD | |
| Maxima Racing Fork Fluid 125/150 (blue) | 7 | 26.70 | 5.36 | 151 | - | - | 4.98 | Maxima | |
| PJ1 Fork Tuner (7.5wt) | 7.5 | 27.50 | 5.1 | - | 113 | 0.81 | 5.39 | PVD | |
| Castrol Synthetic Fork Oil (5wt) | 5 | 28.00 | 5.7 | 151 | 149 | 0.8 | 4.91 | PVD | |
| …hlins Shock Absorber Fluid No. 131 (#00105-01) | - | 28.70 | 9.4 | 340 | 340 | 0.67 | 3.05 | PVD | |
| Maxima Racing Shock Fluid Heavy (clear) | 10 | 28.94 | 9.36 | 300 | - | - | 3.09 | Maxima | |
| Bel-Ray Fork Oil (7wt) | 7 | 29.00 | 5.2 | 110 | 108 | 0.82 | 5.58 | PVD | |
| Maxima Racing Shock Fluid (Heavy, 10wt) | 10 | 29.00 | 9.4 | 334 | 336 | 0.68 | 3.09 | PVD | |
| …hlins (High Performance) | - | 30.25 | 10.18 | 352 | 352 | 0.66 | 2.97 | PVD | what is this? |
| Red Line (Medium, Red) | 10 | 30.40 | 10.8 | 369 | 374 | 0.64 | 2.81 | PVD | |
| …hlins Front Fork Fluid (No. 15, #1315-01) | - | 30.70 | - | - | - | 0.51 | - | PVD | |
| Agip Fork (7.5wt) | 7.5 | 31.00 | 6.4 | 163 | 165 | 0.79 | 4.84 | PVD | |
| PJ1 Fork Tuner (5wt) | 5 | 31.20 | 5.4 | - | 106 | 0.83 | 5.78 | PVD | |
| Fox Shox (Torco RSF Medium) | - | 31.82 | 9.57 | 300 | 309 | 0.7 | 3.32 | PVD | |
| Torco RSF Medium (Purple) | - | 31.82 | 9.57 | 300 | 309 | 0.7 | 3.32 | PVD | |
| Maxima Bicycle Fork Fluid (10wt) | 10 | 32.00 | 6.28 | 151 | 151 | 0.8 | 5.1 | PVD | |
| Maxima Fork Oil (10wt) | 10 | 32.00 | 6.28 | 151 | 151 | 0.8 | 5.1 | PVD | |
| Maxmima Racing Fork Fluid (165/150, 10 wt) | 10 | 32.00 | 6.28 | 151 | 151 | 0.8 | 5.1 | PVD | |
| Spectro Fork Oil (10wt) | 10 | 32.80 | 5.6 | 111 | 107 | 0.83 | 5.86 | PVD | |
| RaceTech (Motorex) (Medium US2) | 10 | 32.90 | 7.2 | 200 | 192 | 0.78 | 4.57 | PVD | |
| Bel-Ray Fork Oil (10wt) | 10 | 33.00 | 5.9 | 123 | 123 | 0.82 | 5.59 | PVD | |
| RockShox (10wt) (Torco 15) | 10 | 33.00 | 8.4 | 240 | 247 | 0.75 | 3.93 | PVD | |
| Torco RFF 15 | 15 | 33.00 | 8.4 | 240 | 247 | 0.75 | 3.93 | PVD | |
| Shell Advance Fork 5 | 5 | 33.05 | 7.09 | 185 | 185 | 0.79 | 4.66 | PVD | |
| Kayaba G10S | 10 | 33.20 | 5.7 | 111 | 111 | 0.83 | 5.82 | PVD | |
| Yamaha (Suspension G10) | - | 33.20 | - | - | - | - | - | PVD | |
| Suzuki (Fork G10) | - | 33.30 | - | - | - | - | - | PVD | |
| White Power (7.5) | 7.5 | 33.43 | - | - | - | - | - | PVD | |
| Bel-Ray HVI (10wt) | 10 | 33.50 | 10 | 306 | 308 | 0.7 | 3.35 | PVD | |
| PJ1 Fork Tuner (10wt) | 10 | 33.90 | 5.7 | - | 106 | 0.83 | 5.95 | PVD | |
| Kawasaki (Fork G10) | 10 | 33.90 | - | - | - | - | - | PVD | |
| Red Line D4 ATF | - | 34.00 | 7.5 | 198 | 197 | 0.78 | 4.53 | PVD | |
| Mobil 1 Synthetic ATF | - | 34.00 | 7.6 | 199 | 202 | 0.78 | 4.47 | PVD | |
| Silkolene Fork Oil (10wt) | 10 | 34.90 | 7.05 | 169 | 169 | 0.8 | 4.95 | PVD | |
| Honda Pro HP Fork Oil (SS-47) (10 wt) | 10 | 35.20 | - | - | - | 0.59 | - | PVD | |
| Motul Fork Oil, Comfort (Medium 5-10) | 7.5 | 35.30 | 6 | 115 | 114 | 0.83 | 5.88 | PVD | |
| Bardahl (10w Fork Oil) | 10 | 35.50 | 6.9 | 158 | 158 | 0.81 | 5.14 | PVD | |
| Motorex Racing Fork Oil (7.5w) | 7.5 | 35.90 | 7.7 | 190 | - | - | - | PVD | |
| Showa Suspension Fluid SS-08 (10wt) (Apollo) | 10 | 36.47 | 7.24 | 200 | 167 | 0.8 | 5.04 | PVD | |
| Silkolene Pro RSF (7.5wt) | 7.5 | 37.00 | 12 | 322 | 339 | 0.68 | 3.08 | PVD | |
| Maxima Racing Fork Fluid 165/150 (clear) | 10 | 37.40 | 7.72 | 182 | - | - | 4.84 | Maxima | |
| Maxima Fork Oil | 10 | 37.40 | 7.72 | 182 | - | - | 4.84 | Maxima | |
| Shell Advance Fork 10 | 10 | 38.97 | 7.44 | 161 | 161 | 0.81 | 5.24 | PVD | |
| Castrol Synthetic Fork Oil (10wt) | 10 | 42.00 | 7.5 | 150 | 147 | 0.82 | 5.6 | PVD | |
| RockShox (15w Extra Heavy) (Torco 20) | 15 | 42.80 | 10.4 | 250 | 245 | 0.76 | 4.12 | PVD | |
| Torco RFF 20 | 20 | 42.80 | 10.4 | 250 | 245 | 0.76 | 4.12 | PVD | |
| Agip Fork (10wt) | 10 | 45.00 | 8.3 | 164 | 162 | 0.82 | 5.42 | PVD | |
| Elf Moto Fork Oil SYN (10) | 10 | 45.40 | 7.6 | 135 | 134 | 0.83 | 5.97 | PVD | |
| Spectro Fork Oil (15wt) | 15 | 45.60 | 7.2 | 119 | 118 | 0.84 | 6.33 | PVD | |
| Repsol Moto Horquillas Fork Oil (10W20) | - | 46.00 | 8.4 | 150 | 161 | 0.82 | 5.48 | PVD | |
| Maxima Bicycle Fork Fluid (15wt) | 15 | 46.00 | 8.48 | 154 | 163 | 0.82 | 5.42 | PVD | |
| Maxima Fork Oil (15wt) | 15 | 46.00 | 8.48 | 154 | 163 | 0.82 | 5.42 | PVD | |
| Maxima Racing Fork Fluid (235/150, 15wt) | 15 | 46.00 | 8.48 | 154 | 163 | 0.82 | 5.42 | PVD | |
| Castrol Fork Oil (15wt) | 15 | 46.50 | 8.3 | 150 | 155 | 0.82 | 5.6 | PVD | |
| ELF Moto Fork Oil (10wt) | 10 | 47.00 | 8.3 | 153 | 153 | 0.82 | 5.66 | PVD | |
| Maxima Racing Fork Fluid 235/150 (orange) | 15 | 47.10 | 8.94 | 151 | - | - | 5.27 | Maxima | |
| Maxima Fork Oil | 15 | 47.10 | 8.49 | 151 | - | - | 5.55 | Maxima | |
| Spectro, Golden Spectro (light) | - | 47.27 | 16.76 | 235 | 370 | 0.65 | 2.82 | PVD | |
| Kayaba G15S | 15 | 47.30 | 7.2 | 112 | 112 | 0.85 | 6.57 | PVD | |
| Yamaha (Suspension G15) | 15 | 47.30 | - | - | - | - | - | PVD | |
| Silkolene Pro RSF (10wt) | 10 | 47.36 | 13.69 | 303 | 303 | 0.71 | 3.46 | PVD | |
| Suzuki (Fork G15) | 15 | 47.70 | - | - | - | - | - | PVD | |
| White Power (10) | 10 | 48.07 | - | - | - | - | - | PVD | |
| Silkolene Fork Oil (15wt) | 15 | 48.45 | 8.5 | 153 | 153 | 0.82 | 5.7 | PVD | |
| Bel-Ray HVI (15wt) | 15 | 49.00 | 13.9 | 297 | 298 | 0.72 | 3.53 | PVD | |
| Kawasaki (Fork G15) | 15 | 49.50 | - | - | - | - | - | PVD | |
| Motorex Racing Fork oil (10w) | 10 | 52.50 | 9.9 | 170 | - | - | - | PVD | |
| Bel-Ray Fork Oil (15wt) | 15 | 53.00 | 7.5 | 103 | 103 | 0.86 | 7.07 | PVD | |
| Red Line High Temp ATF | - | 53.90 | 10 | 172 | 176 | 0.81 | 5.39 | PVD | |
| PJ1 Fork Tuner (15wt) | 15 | 55.30 | 8.7 | - | 133 | 0.84 | 6.36 | PVD | |
| Motul Fork Oil Factory Line (Heavy 15-20) | - | 61.00 | 13.2 | 224 | 225 | 0.78 | 4.62 | PVD | |
| PJ1 Fork Tuner (20wt) | 20 | 61.70 | 8.4 | - | 106 | 0.86 | 7.35 | PVD | |
| Spectro Fork Oil (20wt) | 20 | 65.00 | 8.9 | 110 | 111 | 0.86 | 7.3 | PVD | |
| Maxima Bicycle Fork Fluid (20wt) | 20 | 65.00 | 12.9 | 201 | 204 | 0.8 | 5.04 | PVD | |
| Maxima Fork Oil (20wt) | 20 | 65.60 | 12.9 | 201 | 202 | 0.8 | 5.09 | PVD | |
| Red Line (Heavy, orange) | 30 | 66.80 | 16 | 256 | 256 | 0.76 | 4.18 | PVD | |
| Shell Advance Fork 15 | 15 | 67.00 | 10.37 | 120 | 143 | 0.85 | 6.46 | PVD | |
| Silkolene Fork Oil (20wt) | 20 | 67.70 | 8.75 | 101 | 101 | 0.87 | 7.74 | PVD | |
| White Power (15) | 15 | 67.81 | - | - | - | - | - | PVD | |
| Castrol Fork Oil (20wt) | 20 | 68.00 | 11.2 | 150 | 159 | 0.84 | 6.07 | PVD | |
| Repsol Moto Horquillas Fork Oil (15W30) | - | 68.00 | 11.2 | 150 | 159 | 0.84 | 6.07 | PVD | |
| Agip Fork (15wt) | 15 | 69.00 | 11.5 | 162 | 163 | 0.83 | 6 | PVD | |
| Motorex Racing Fork Oil (15w) | 15 | 69.80 | 12.8 | 160 | - | - | - | PVD | |
| Maxima Fork Oil | 20 | 71.10 | 11.28 | 151 | - | - | 6.30 | Maxima | |
| Elf Moto Fork Oil (15) | 15 | 72.60 | 11.6 | 155 | 155 | 0.84 | 6.26 | PVD | |
| Bel-Ray Fork Oil (20wt) | 20 | 73.50 | 9.5 | 106 | 107 | 0.87 | 7.74 | PVD | |
| Motul Fork Oil - Comfort (Heavy 15-20) | - | 77.90 | 10.1 | 111 | 112 | 0.87 | 7.71 | PVD | |
| Torco Synthetic RTF | - | 82.50 | 14.33 | 182 | 182 | 0.83 | 5.76 | PVD | |
| Motorex Semi-Bath fork oil, 5W40 | - | 90.90 | 14.6 | 169 | 168 | 0.84 | 6.23 | PVD | |
| Silkolene Pro RSF (15wt) | 15 | 92.50 | 19.5 | 235 | 233 | 0.79 | 4.77 | PVD | |
| ELF Moto Fork Oil (20) | 20 | 99.00 | 14.6 | 150 | 153 | 0.85 | 6.78 | PVD | |
| Agip Fork (20wt) | 20 | 104.00 | 15.03 | 155 | 151 | 0.86 | 6.92 | PVD | |
| Silkolene Fork Oil (30wt) | 30 | 105.00 | 11.84 | 101 | 102 | 0.89 | 8.87 | PVD | |
| Bel-Ray Fork Oil (30wt) | 30 | 105.00 | 12 | 104 | 104 | 0.89 | 8.75 | PVD | |
| Kayaba G30S | 30 | 116.10 | 16.7 | 156 | 156 | 0.86 | 6.95 | PVD | |
| PJ1 Fork Tuner (30wt) | 30 | 116.90 | 15 | - | 133 | 0.87 | 7.79 | PVD | |
| Spectro, Golden American 4 (20w50) | - | 155.00 | 19.6 | 146 | 145 | 0.87 | 7.91 | PVD |