89 octane

[ramthis9501]

I put $20 worth of 89 in my truck yesterday. It seems to be running better, should I start running 89 in it from now on?

[FL06SRT10]

What's the specs? Ya only need the octane if it's built for it.

[ramthis9501]

It says 87 but i would think a higher octane would help out

[txbass06]

Ya only need the octane if it's built for it.

Not necessarily... I run 93 octane in mine and it's far from built


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[FL06SRT10]

You only need the octane to prevent detonation which depends how aggressive the timing curve is and thus the tune. Otherwise just a waste IMHO

[ramthis9501]

Mark do you notice any difference running 93 over other octane?

[ramthis9501]

So 87 or 89?

[AWE Daniel]

I have the truck at the 91 tune with the diablo and run 93, it gives me a tiny mileage bump but thats about it.

[txbass06]

Running 93 got rid of the little stumble at idle my truck had at idle and it pulls a little better that when I was running 87


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[ramthis9501]

Think it would be better to run 89?

[FL06SRT10]

I say try 87 and see if you have any detonation and if so then go up a grade. But if it's designed for 87 then ya should be fine.

[AParrette]

my 360 loved 91 oct.

and if you get a superchips and only drive in town put it on gas saver
i b urned my tires in 4 months

[ramthis9501]

I say try 87 and see if you have any detonation and if so then go up a grade. But if it's designed for 87 then ya should be fine.

I've been running 87 the whole time, and it pings a bit under accelration. That's why I want to upgrade to 89 and see if that fixes it

[OklaHemi]

jst put 10 gal in there and run it. it will be fine. the only time you should have a problem is running less of an octane constantly. i have ran 87 in my hemi under desperate circumstances and had no problems what so ever.

when i worked in colorado i would add a quart of methanol to every tank in my brand new 08 and my 02 envoy. i put some in my 05 hemi, i only had a scary experience with the 02 envoy the very first time i ran it but it sorted itself out and ran like a champ. i have no idea what methanol will raise the octane to

[ramthis9501]

89 it is, I think it's worth the extra couple of bucks to save the engine from detonation and might also get a little bit better mileage and performance

[OklaHemi]

2 octane up wont hurt

[Redtruck-VA]

Methanol has a very high octane level. It was one of the things I talked about on the tuning thread. Instead of running CAM2 with an aggressive timing use the methanol injection at a hugh savings. I use 93 octane with a SC91 canned tune with the power wire and still get a little kr at WOT. Methanol inj should take care of the kr and I might beable to use 89 octane iinstead of 93. We will see.

[FL06SRT10]

Sounds like that's what ya should do if ping at 87 :) also might want to check when was your last tune up? Maybe run some sea foam through the engine to clean things up... I run a bottle of Lucas every month just to keep injectors clean.