POLL What octane gas is everyone using?

[chrisjm91]

Please, if you're outside Canada, the United States, and Brazil, vote for the RON value(s) you use - the number to the right.

octane.jpg (54.23 KiB) Viewed 4556 times

I drive a 95 850 turbo with about 100k miles on it and just recently switched to 93 after reading up on octanes. I have to say I've noticed a little bit smoother engine. Just wondering if I'm crazy or if other volvo enthusiasts are running 93 octane in the turbo models volvos, as well as N/A.......

[erikv11]

I run the standard high octane in my turbos (that's 92 around here) and 89 in the NAs.

[scot850]

Called premium here in Canada and is 91/92 octane. I use this on Volvo turbos. On the 850NA I used 87 octane around town (Regular gas), but 91 for highway.

Neil.

[taxi]

I use 98 octane, it's either that or 95. Maybe that's one of the reasons fuel is so expensive here

[precopster]

Definitely no pinging noises on our 95 or 98 octane fuel in our turbo XC 2002. There's another story when running 91 or 94 octane with 10% ethanol in the same car.

Haven't noticed any difference in my 2000 V70 NA between fuels as I don't think that the fuel management system yields any more power or economy with better fuels.

[draser]

It seems that the base gas coming from refineries is the same, then it gets anti knock and other additives that actually makes the 85, 87 and 92 octanes. The caloric power, or BTU is the same, hence no actual difference felt in NA engines. Curious though, why in a LP turbo that has a base CR of 8.6 :1 we still need to use premium gas? How much higher does compression get due to turbo?

[taxi]

O don't know why, but doesn't turbo engines have less compression?

[abscate]

My 1999 T5 is 8.5:1 compression ratio - I use regular gas in that, as I stay off the boost. In summer, when I tow boats, I go to 93

My 2005 is 10.5 compression ratio NA and gets 93 year round.

Turbos have lower compression so they don't blow up...

[misha]

I use premium bmb 95 all the time.
In the past...it was just bmb 95.
We don't have lower octane fuel than 95 on gas stations here in Serbia.

When i was a kid there was regular,super 95 & 98 and unleaded petrol available on all gas stations.
Now....super and regular are forbidden by our "gouverment" laws and there is only BMB (unleaded) available in 95 & 98 octanes.

[mnorris23]

I drive a 95 850 turbo with about 100k miles on it and just recently switched to 93 after reading up on octanes. I have to say I've noticed a little bit smoother engine. Just wondering if I'm crazy or if other volvo enthusiasts are running 93 octane in the turbo models volvos, as well as N/A.......

I ran 93 for a week in my s70 (turbo) and it did seem smoother. Being young and working a minimum wage job I had to drop back to unleaded because I couldn't afford it.