But servo 1 will sell 91(e10), 95, 98, servo 2 will sell 91, 94(e10), 98, servo 3 will sell 91(e10), 98 etc.E10 isn’t always 91, and 91 isn’t always E10.Ah yea, I just drive on. In fact, octane has nothing to do with energy content or quality – it’s a measurement of the gasoline’s ability to resist engine knock.

The octane rating is prominently displayed in large black numbers on a yellow background on gasoline pumps. This is because higher-octane fuels allow for a higher compression ratio without knocking, resulting in a higher cylinder … how much pressure the gasoline mixture is put under, has a direct correlation, then, with the recommended octane rating of the vehicle.

This is blatantly false in most circumstances, especially so these days. Chevrolet recommends premium for the Volt for this very reason.If people are not using the extended range capability a lot, the Gasoline with an octane rating of 85 is available in some high-elevation areas of the U.S. (more about that below ). If that is true, then the question becomes whether your car benefits from the additional additives. That means that without boost, the car should be able to handle regular gas. 91 in some stations will be just plain 91 octane, or it might be E10.Since when can they sell you ethanol based fuel without labelling it?It is labeled. Premium Unleaded (95 RON) Higher octane fuels are specified where higher compression ratios are present in an engine, or where forced induction (such as turbo charging) is used. @Guy, which conflict of interest are you pointing out?

Would I need to fill up with premium every time to enjoy these benefits, or does treating the car to a periodic tankful help in some way?There is absolutely no reason to use higher-octane fuel unless your car explicitly requires it.The higher the octane, the more compression/heat required to combust the fuel. So if it says 87 or higher, and you want your car to last with less of a chance of a hefty repair bill, go higher.This interesting subject has many variables. But check your car’s handbook or the label inside the fuel filler cap to find out if high-octane fuel is recommended. This is the sort of thing we get in the UK under the "premium petrol" label:Hmm, that's a lot of marketing speak that leaves me more confused than educated. The Crossword Solver finds answers to American-style crosswords, British-style crosswords, general knowledge crosswords and cryptic crossword puzzles. Higher octane denotes greater knock control. A fuel can be rated as low as 87 Octanes and considered as normal/ standard fuel.

Gasoline refineries raise and lowers fuel RVP ratings seasonally to account for the differences in temperature. The fuel to air mixtures in modern ECUs are well understood and motivated. An engine tuned for LPG fuel via higher compression ratios (typically 12:1) improves the power output. The compression ratio on the Fiat Abarth is apparently 9.8:1 (higher than my old Mustang V8) with a peak boost of 18.1 psi. In the U.S., unleaded gasoline typically has octane ratings of 87 (regular), 88–90 (midgrade), and 91–94 (premium). The Crossword Solver found 21 answers to the high octane petrol crossword clue. Enter the answer length or the answer pattern to get better results. (source: I was once an oil refinery engineer). I know Subies have had head gasket issues, but haven't heard this was the cause.

The compression ratio of the engine, i.e. Most opinions have been based on the supposition the an engine will be operated at its extremes of power demand.In any petrol engine, fuel that is too low on octane can cause damage through detonation, more quickly if it occurs at high engine load and revolutions.

If they said use higher octane fuel from the get go, they wouldn't have the big problem they're having. Worst case scenario is you’ve just wasted some money by buying the more expensive fuel.If you put the lower octane fuel in an engine which specifies high octane fuel, will not cause you any major issues on an electronic fuel injected engine because it has a device known as a “knock sensor” which will pull timing.…When you mix different octanes of fuel, you are either increasing or decreasing the octane of the fuel at hand. This reduces economy and increases emissions but will allow you to limp home on lesser fuel.That said, check the owners manual and use the octane recommended.