i guess they dont release specs whatsoever on non fuel injectors.
Commonly Used CNG/LNG/LPG Elastomers:
Nitriles (NBR) - listed as compatible with e85, listed as "good" chemical resistance to e85 but commonly seen to suffer failures from prolonged e85 use.
Saturated nitriles (HNBR) basically NBR with better temperature properties. Should hold up to e85 but wouldn't put thousands of miles on it.
Fluorocarbons (Viton and other FKM’s) - 100% compatible with e85,
http://www.applerubber.com/hot-topics-for-engineers/effects-of-methanol-on-rubber-elastomers/91% swell with methanol for dipolymer FKMs ... so no
1% swell with viton. Viton is common so would be perf for methanol.
Fluorosilicones - compatible with e85, methanol, jet fuel, everything.
In the automotive market, fluorosilicones are the seal material of choice for handling gasoline, E85, diesel fuel, biodiesel, and ULSD at extremely low temperatures. In the aerospace industry, fluorosilicones are used for handling jet fuel on commercial, military, and all general types of aviation aircrafts. The materials are also being used in sealing fire-resistant synthetic hydrocarbon hydraulic fluids in static applications, especially those used at low temperatures
5% swell with methanol.
Sounds like the 160's used some low grade elastomers and they get updated to something like listed above, which means there is a damn good chance they're perfectly fine with e85, and most likely with methanol as well (esp if only used briefly on a track day)
