What Octane?

[circmand]

not VX specific using gas with octane above revomended will do nether harm norimprovement. Using oil rather than recomended can cause engine failure. That being said I occasionally run 110 octane through me Jensen Healey and clean the carbs out.

[Tiger66]

BS on both! with the SC you can certainly use the higher octane, if it doesn't need it, it will be just wasted but no harm. And synthetic oil meets and/or exceeds all SAE specs. Plus it does not breakdown like conventional oil. The guys does not know what he's talking about.

[VXRaNgEr]

Where to they FIND these service guys!? An octane rating is just how resistant a fuel is to compression detonation (you want the spark to ignite the fuel, not compression or else you get knocking). Higher octane is just more resistant to causing knocking. Ain't NOTHIN wrong with that. Usually, the higher the compression ratio, the higher the octane, but if you put higher octane in your engine its only going to run better and protect it better from pre-detonation/knocking. Now go back there and kick him square in the huevos!

BTW...because of our elevation, Colorado's regular grade is 85.

[SGT.BATGUANO]

He may not be totally wrong on the octane thing. I read somewhere that higher octane gas doesn't "burn" as efficiently in an engine that doesn't "need" it. What you need is a method to monitor your knock counts and up the octane until they stay at zero.

[redline]

Neighbor owns a gas station /He says Mid grade is the way to go.Has all the additives to keep injectors clean and octane is 89 .Can't tell the difference w/Premium 94 octane ,just a lighter wallet.

[AlaskaVX]

Originally posted by VXRaNgEr
BTW...because of our elevation, Colorado's regular grade is 85.

Thats crazy, it actually says 87 is the minimum for the VX in the manual. I have never heard of anything less than 87

[AK VX Lvr]

Usually use 90---since it's the highest available everywhere. I spoil my VX even if it does lighten the wallet (maybe needlessly).

[VXRaNgEr]

Hmmm....it appears you're right:

http://www.koaa.com/features/investi...iew.asp?ID=251

Looks like I'll be switching to 87!

[AlaskaVX]

If I was in Colorado I would start getting people together and get the "public outcry" that they say they need. As it is now up in AK we pay $1.63 for regular 87 octane, if you are paying more I would be ! I really can't see how everyone would be OK with this
And I thought Spazz was just messing around saying 85, especially when he stated he got better performance out of it ;eekr;

[Chopper]

I've used 93 and Mobile1 since it was 11mi. old.Still purrs just fine thank you

[Newsman]

Hotsauce -- you and I were thinking the same thing...

I've actually run my VX (stock engine) through a test of 10 tankfuls of 87 and 10 tankfuls of 93. I do about 50% city driving and 50% highway (with offroading another 10% -- wait a minute...) and I found that my gas mileage did go up slightly with the higher octane (something along the order of about .5 mpg).

My main goal in the test was to see if the higher octane was actually cheaper to run (to see if the better gas mileage would compensate for the higher price at the pump) and I found it really didn't.

If I remember correctly when I did the test it worked out to about $.08 per mile on the 87 and about $.10 per mile on the 93.

In terms of performance, I honestly haven't seen any performance dip or higher knock count on the 87.

[VX-KING]

Sorry guys but i mix my gas for my vehicross

[VX_PA]

Originally posted by VX-KING
Sorry guys but i mix my gas for my vehicross

Mix it?? What are you running??

Octane Boost (104+)
Turbo Blue
Jet Fuel
50/50 Mix

Wow, that's some machine!!!
;eekp;

[Dallas4u]

Originally posted by VX-KING
Sorry guys but i mix my gas for my vehicross

Don't be sorry. many people mix different octanes to get a good "in between" for the money.

[Tone]

VX King - the only one to talk so much about a VX NO one has ever seen....