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Originally Posted by Kelbyat07
What do you mean it runs a bit rich on stock header? And do you think I should use a different oil when I run on E85 because I got different people telling me that they are using stock oil and some are using different ones.
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The E85 EL header stage2 tune was actually done to run on a catless header which flow a bit better than stock header, so top end it runs a bit rich AFR when running on a stock car, but running a bit rich afr wise is safe anyway, heaps of people have run that tune on a stock car for long periods no issues.
Make sure your oil is E85 compatable, most SN rated oils should be ,a lot of people change out the stock oil when running E85 as your not 100% sure what it is.