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alex67000

E85 in my cadillac STS 94 northstar...

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Hello guys, i am french, i have a Cadillac STS 94 Northstar with 70000 miles, in France the E85 is half price as gazoline, 1 quart of gaz cost 2,25 $ and 1 quart of E85 cost 1,10 $, many people put E85 in the car and they dont have a flexfuel car, in France the gaz have 10% E85, many car drive with 30%,50% or 80% E85 in the tank, my question is, how many % of E85 can i put in my STS Northstar???? can i damage the motor? or the headgasket with E85???? thank you for youre answer

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Hello alex. Like many on this forum I have experimented with different mixtures on my '97 Cad Northstar. For some reason it seems to not like more than about a E 35 mix. Other non FFV makes appear to have higher tolerances, but the GM techs tell me that the Northstar has its own "language" compared to other GM models. To answer your question, I have run an E 30 mix for thousands of miles with no ill effects. As this is a "premium" fuel engine, it just loves the E 30 mix.

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hello beechcraftted , thank you very much for youre answer, the E85 in France cost half price as the premium but a Northstar motor cost many many euros, also i put only premium, youre council are very important thank you my friend...

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