Hi everyone,

I have been reading some of the postings here and no one talks about

the use of octane boost.

I have seen in other states that their "bad" gas has a rating of 95

and the good stuff has a rating of 98-100.

I live in Az. and the "best" gas here is a 92 rating.

I frequently use octane boost to bring it up to 96. The bottle says

that repeated use will not harm O2 sensors,catalytic converters or

turbos.

Does anyone have any comments either way?

Thanks for your help!!

Terrance

My local Volvo dealer uses STP octane booster as part of the periodic service. I tried using it with a tank of regular gas but it just doesn't have that lively performance that I get with a tank of good 'ol 92 octane

My car likes it, so I keep using it. $1.37 a gallon where I live in SC. Works for me! I'd be afraid to use any other octane boosters in my car.

Ron

Try mixing tolulene or xylene 10% mixture to clean injectors ans increase the octane. The Tolulene will raise 93 octane to 95 octane. The STP octane boost only raises the octane points of octane not whole octane. Try the following link http://www.gnttype.org/techarea/misc/octanebooster.html I use it in my turbo cars and crankup the boost.

Dave

> I have seen in other states that their "bad" gas has a

> rating of 95

> and the good stuff has a rating of 98-100.

Perhaps you mean other countries. Europe and U.S. measure octane

differently. I've never seen gas pump fuel over 93 octane (U.S.

measurement) in our U.S. markets.

91 octane in Europe is about 87 here. You can try google.com and

search on "octane measurement" for more info.

Hi, I have a V70 AWD 97 and use 99 octane gas, because it´s sulfur free and the performance seems to be better on german highways in the high speed range. Top speed is with winter tires about 235 km/h.

With 95 octane petrol acceleration is worse and top speed is about 230 km/h. I think the higher the octane level the better - if you really need it. There does not be a difference at moderate speeds, even not in milage.

Franz

What winter tires are you using?!

And remember, in North America, we rate our octane differently. So "higher" octane numbers in Europe are actually lower in NA.

Remember - when over-the-counter octane boast products say they "raise octane up to 4 points" - they mean 0.4

ie. 92 oct to 92.4

Not very impressive IMO

MAT

Especially at $7 a bottle!!

On one extreme: My wife put regular (87 r+m/2) in my slightly modified 1985 245ti (remember this car has NO knock sensor and a rudimentary boost and fuel control system) - anyhow it almost destroyed my engine, (with boost it sounded like a steel box of marbles) adding a bottle of octane boost did NOTHING, I drove very carefully, until I could get 5 gallons of premium in, then drove anothr 90 miles and topped the tank with premium again - we'll see but I seriously think it may have affected the long term health of the motor at 218,000 miles.

OTOH the 1996 NA 855, doesn't really give a crap what kind of gas. I have noticed a VERY slight increase in mileage with premium, but I swear it "lawn mower" syndromes MORE with premium than with regular. I have no explanation for this.

Your car has been designed to deal with gas as low as 87 Octane. My car is N/A and I really feel no need to use anything other than 87. And I like to drive fast. I have noticed no significant performance or economy advantage from higher octane fuel experiments I have performed with my '98 S70. Turbo-charged engines probably benefit more from higher octane fuel, but 92 seems enough to me. I would not spend the money on octane boosters or even high octane gas. I do run a fuel system cleaner now and again to counteract generally lower levels of detergents in regular grade gas. I also perform "Italian Tuneup" (combines utility and pleasure) every day on the way to work, so I am not really worried about gummed up valves. My car runs great never had a lawn mower syndrome and the milage is ok considering my style of driving.

Cheers.