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POLL What octane gas is everyone using?

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

What octane gas are you using? (US... vs. RON)

<= 84. If you're outside US/Canada -> 88 RON NON-US
0
No votes
85. If you're outside US/Canada -> 89 RON NON-US
0
No votes
86. If you're outside US/Canada -> 90 RON NON-US
0
No votes
87. If you're outside US/Canada -> 91 RON NON-US
7
23%
88. If you're outside US/Canada -> 92 RON NON-US
0
No votes
89. If you're outside US/Canada -> 93 RON NON-US
2
6%
90. If you're outside US/Canada -> 94 RON NON-US
1
3%
91. If you're outside US/Canada -> 95 RON NON-US
10
32%
92. If you're outside US/Canada -> 97 RON NON-US
1
3%
93. If you're outside US/Canada -> 98 RON NON-US
10
32%
94. If you're outside US/Canada -> 99 RON NON-US
0
No votes
=> 95. If you're outside US/Canada -> 100+ RON NON-US
0
No votes
 
Total votes: 31

chrisjm91
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chrisjm91

POLL What octane gas is everyone using?

Post by chrisjm91 » Mon May 18, 2015 8:08 pm

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
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.......
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Last edited by matthew1 on Tue Jul 02, 2019 1:13 pm, edited 1 time in total.



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erikv11
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Re: what octane gas is everyone using?

Post by erikv11 » Mon May 18, 2015 8:55 pm

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


'95 854 T5-R, Motronic 4.4, 185k
'96 855 NA, 140k
'98 S70 NA, 210k (living out west)
'98 V70, T5 tune-injectors-turbo, LPT engine, 280k
'06 S60 R, 160k
gone: '96 NA 850 210k, '98 NA V70 182k

scot850
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Re: what octane gas is everyone using?

Post by scot850 » Mon May 18, 2015 10:45 pm

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.


2000 V70 R - still being an endless PITA
2006 XC70
2003 Toyota 4Runner V8 Limited
2015 Kia Sportage EX-L
1993 850 GLT -Sold
1998 V70 XC - Sold
1997 Volvo 850 SE NA - Went to niece in California - Sold
2000 V70 SE NA - New project and test bed - Sold

taxi
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Re: what octane gas is everyone using?

Post by taxi » Tue May 19, 2015 12:04 am

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



precopster
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Re: what octane gas is everyone using?

Post by precopster » Tue May 19, 2015 6:10 am

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.


Current cars:2002 XC70, 2006 Ssangyong Rodius (Stavic), 2006 XC90 2.5T, VW Transporter 2.5TDI

www.precisioncarmodules.com.

draser
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Re: what octane gas is everyone using?

Post by draser » Tue May 19, 2015 6:29 am

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?


2005 Volvo S60 2.5T, Zimmerman/Akebono brakes
2012 Honda Accord, EBC slotted rotors

taxi
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Re: what octane gas is everyone using?

Post by taxi » Tue May 19, 2015 8:49 am

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



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abscate
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Re: what octane gas is everyone using?

Post by abscate » Tue May 19, 2015 9:34 am

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...

:-)


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A Captain in a Sea of Estrogen
1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW

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misha
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Re: what octane gas is everyone using?

Post by misha » Tue May 19, 2015 11:19 am

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.


'97 850 2.5 20v /fully equipped/ Motronic 4.4 / polar white wagon
'91 Citroen XM 2.0 SI /fully equipped/mandarine red metallic
History of Volvos in the family:
'71 144 S
'73 144 De Luxe
'78 244 DL
'78 244 DL
'79 244 GLE
'85 340 GLS

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mnorris23
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Re: what octane gas is everyone using?

Post by mnorris23 » Tue May 19, 2015 12:00 pm

chrisjm91 wrote: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.


Car I own: 2000 Volvo S70 GLT 130k Stock with OEM replaced parts.

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