Which fuel is best for a GC8 WRX
#1
Which fuel is best for a GC8 WRX
Hi all,
New to the forum but not to subarus!
Just wondering about choice of fuel since bioethanol has been introduced everywhere. Ive always been a Shell Vmax fan but my local indy is saying esso premium has no bioethanol so a better fuel.
I've confusingly (mis)read that up to 30% ethanol can help with efficiency in internal combustion engines.
So...I'd love to get your views on this, thanks in advance.
New to the forum but not to subarus!
Just wondering about choice of fuel since bioethanol has been introduced everywhere. Ive always been a Shell Vmax fan but my local indy is saying esso premium has no bioethanol so a better fuel.
I've confusingly (mis)read that up to 30% ethanol can help with efficiency in internal combustion engines.
So...I'd love to get your views on this, thanks in advance.
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#3
Scooby Regular
iTrader: (2)
yeh there was a link to a test on here I think a few months ago. The YouTube vid showed a tuned seat Leon Cupra dyno run on various different fuels. Tesco came out the best giving an increase in 5bhp and had the best knock detection additives, closely followed by v power. I’m not sure if the esso super unleaded tested was 99ron or if it was before they introduced that, but the esso fuel was next followed by bp ultimate, which gave pretty much no power gain over normal unleaded and had pretty poor knock detection qualities.
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#5
#6
yeh there was a link to a test on here I think a few months ago. The YouTube vid showed a tuned seat Leon Cupra dyno run on various different fuels. Tesco came out the best giving an increase in 5bhp and had the best knock detection additives, closely followed by v power. I’m not sure if the esso super unleaded tested was 99ron or if it was before they introduced that, but the esso fuel was next followed by bp ultimate, which gave pretty much no power gain over normal unleaded and had pretty poor knock detection qualities.
Does the ecu map or actual engine make a difference?
Thinking boxer vs inline, mines a gc8 i imagine the Seat is newer.
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#9
Scooby Regular
I'd only ever used Shell V power for years as that's what the car was mapped with but when we had a V power shortage in my area for wks and wks a couple of years back i took to using Tesco Momentum 99 as a stop gap, been using it ever since and runs fine and a lot cheaper than V power, and even to this day V power ain't always readily available at my nearest Shell garage.
#10
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all petrol regardless of brand comes as a base fuel from the same uk refineries. Then the various brands add their own recipe of additives. Tesco fuel is Tesco fuel. They do however have a lot of esso pumps in Tesco express forecourts but I don’t think momentum is the same as esso super unleaded (well, it definitely isn’t according to the above YouTube vid)
#11
Scooby Regular
iTrader: (1)
Another vote here for Tesco Momentum (Classic PPP). Definitely perkier after using any of the branded fuels.
Also, my only engine meltdown in 100+ cars I've owned or company leased was run exclusively on Shell.
Probably a coincidence (or wrong octane fuel in the pump) but I've never touched it since. Bit like Jaegermeister...
Also, my only engine meltdown in 100+ cars I've owned or company leased was run exclusively on Shell.
Probably a coincidence (or wrong octane fuel in the pump) but I've never touched it since. Bit like Jaegermeister...
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