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BZG|Bling wrote:Would read thread again.
GDII wrote:Also people probably haven't been told that running 91 in most modern cars is bad for the engine and economy.
Adoom wrote:GDII wrote:Also people probably haven't been told that running 91 in most modern cars is bad for the engine and economy.
Define "modern".
'93 AE100 = ?
I put 91 in it because I never drive it and am financially over extended rather than cheap.
molex wrote:While I agree with everything said and exclusively run my cars on 98, there are some exceptions to the high compression = high octane rule..
1zz-fe despite being 10:1 was specifically designed with some advanced 'taper squish' piston/head intended to reduce knock resistance with sub-par fuel, they're officially recommended to run on 91. That's not to say you wouldn't improve mileage with more octane, but in this case it might not actually stack up to savings as the timing retard would not be extreme.
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