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) - 5.50 2.3 344 343 0.58 2.39 PVD Red Line (extra light, Blue) - 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 Öhlins 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 Öhlins 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) - 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 Öhlins 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 Öhlins 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 Öhlins 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 Öhlins (High Performance) - 30.25 10.18 352 352 0.66 2.97 PVD what is this? Red Line (Medium, Red) - 30.40 10.8 369 374 0.64 2.81 PVD Öhlins 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 (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) - 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