Octane Question

call and ask brenspeed. As far as i know, running a 93 octane with 92 octane should be fine. 92 is a minmum rating, which means it could be higher than 92 but not less.

if you can get racing gas where you are, put in 1 gal.to the rest.it will raise your oct.

The plugs on our cars do not like octane booster. DO asearch and you'll find pictures of reddish orange crap on the plugs. At the price these plugs cost it's not worth it.

The only fuel additive that is acceptable is the Chevron Techron concentrate fuel system cleaner.

That color is normal for too much octane booster or too much fuel additive. But like you said our cars are much more sensitive to additives and octane booster in the fuel. I have 30000 miles on my mustang, I changed the plugs about 1000 miles ago. I run about 3 ounces of Redline fuel system cleaner at every fillup. Also had a who bottle every 3000 miles on a full tank. My plugs did have a redish orangish color to them. But the tops of the pistons (from what I could see) look very clean, not much carbon build up at all. On the other hand the plugs were tough to get out. I had the turn them a quater turn at a time. I also shot some penetrate down there and keep turning them slowly. Never had a car do that and I work on cars for a living (BMW Tech). Also around 4 months ago when I was installing the FRPP delete plates, I noticed how clean the intake valves and the intake ports looked. I still continue to use fuel additives but I use the techron more so now than the redline additive.

I run 93 octane on a 91 octane tune. Nothing negative has happened yet. Going on 24k miles.

yeah, but his issue is opposite of what you said.

you use 93 octane on a 91 tune. thats a safer tune.

running 92 octane on a 93 tune is different, but still i ran 87 octane on my 91 tune for a couple days and dint get any ping, then i filled up with 91.