what kind of gas should i use for my 96 gs. we have been puttin 93 octane in because we dont have a manual that says what kind of gas. i also think this might help my bogging at 9,000 rpms. and suggestions and comments would be greatly appreciated.
Just use the lowest grade fuel. (burns easier) Trust me. The only reason you would want to go higher is if you increased the compression or that the engine has a million miles on it. (save your money-go cheaper)
I have my 03' manual here in front of me now I will quote from page 21.
FUEL
Use unleaded gasoline with an octane rating of 91 or higher (research method). Unleaded gasoline can extend spark plug life and exhaust components life.
If pinking (do they mean pinging?) or knocking is experienced, substitute higher octane grade gasoline or another brand, because there are differences between brands.
I use 98 octane fuel, just a habbit from running my turbo starlet... I have read that higher octane does not do much, JeffD can you explain it a little more for me?!
Thanks
Stay Safe :thumb:
Higher octane just takes a little longer to ignite. Nothing else. Use the lowest octane that does not cause pinging or detonation. High compression engines require high octane fuel. The GS's 9:1 compression ratio is not high enough to qualify.
If you use an ignition advancer, you will need premium unleaded because fo the advanced timing.
are you sure that its the same as 91octane in the US? Because my vw (german) required 91 ron gasoline which is like 86 Octane US fuel. But my best guess would be go lower to highest. Put in the cheapest stuff and see how it runs, if it runs worse go up one rating.
BTW just because it costs more doesn't mean its better. 87,89,92 octane gas are basically the same thing but with a little bit more of one chemical that resists ignition. I mean Aircraft grade fuel is like 110 octane but thats leaded etc. And racecars usually run 105 octane because they run soooo hot.
Basically go cheapest then up, not the other way around.
A 91 RON number (used in Europe/Far East) is the same as US 87 (R+M)/2 octane number.
There's Research Octane Number, which is essentially best-case under laboratory conditions, and Mechanical Octane Number, which is essentially a worst-case rating of octane.
Europe uses RON ratings, where the US uses an average of RON and MON for a rating.
87 octane regular unleaded gas should be just fine.