[KingLT1]

Originally Posted by ZL1C7

I have seen ugly oil on cars that we have built and get moved around the shop often over a long period of time. This is almost certainly a result of not reaching operating temperature. Depending on driving distance and weather condition some cars seem to require oil changes every 2k miles. Coyote Mustangs will have fuel pump failure if you don't put a fuel lubricant in the tank. Some have even reported high pressure pump and injector failure. If a Ford dealer is made aware of E85 use they will void all fuel system related warrenty claims.

GM vehicles have fuel systems designed to handle E85.

[ZL1C7]

I would agree with that. Some of the early stuff will deteriorate but later stuff holds up fine. As with any fuel system, leaving E in the tank and injectors for a long period of time can cause some issues. I clean/flow port injectors and have seen my share of gummed up mess