So, Everything I'm reading says that the 96 EJ25 motors require 93 octane. My question is, what if I retarded the timing a few degrees, would it then most likely run ok on 89? I have ECUTEK's Delta Dash software and with it I can globally adjust the ignition timing +/- a few degrees. Does anybody think it would work or am I wasting my time? I know I wouldn't get the same performance, but unless I'd be towing or hauling around a bunch of people I don't think I'd care.

 

What do you think?

 

Keith

It would work fine, the CR on that engine is not that high and you might not even need to dial the timing back that much unless it is under load or higher temps.

Have you tried running on 87 octane? My 96 OBW with 2.5 runs on 87 octane with no pinging. I live on a long, steep hill and have not had pinging yet using 87 octane. Also checked gas mileage between 87 and 91 octane and no difference.

Well, I don't own the car yet. It gets picked up next week and then it will be some time before I can try to get it fixed and on the road. For now I'm just posing the question. Also, you live in PA, of course you live on a hill I my self live at the base of a hill, some even call it a mountain. I basically have to drive over it and another "mountain" to get to work. PA is great like that, especially in the winter!

 

Keith