Quick Answer: At What Compression Ratio Do You Need Premium Fuel?

At what compression do you need race fuel?

So, the moral of the story is; unless you have at least 12:1 compression (of more), do not run any 110 octane or higher race gas in it or you’ll go slower.

If you have 10:1 – 11:1, you can run up to about 100 octane and be fine, but if you have in the 9:1 area, don’t even bother..

Does premium gas give better mileage?

Premium gas gives you more miles per gallon than regular gas. … In actual fact, you’ll get a greater range of fuel economy between different brands of regular gas, than you will between the same manufacturer’s regular and premium gasses.

Is it OK to mix 89 and 93 gas?

No, you will not damage your engine by mixing different octane fuel. It is still fuel. Say you mixed 2 gallons of 87 octane with 2 gallons of 89 octane and 2 gallons of 93 octane.

How much HP does 93 octane add?

Switching from 87 octane to 93 yielded a 7-hp gain on the dynamometer, but that advantage was lost in the noise at the track.

Which is better 95 or 98 octane?

The main difference between 95 petrol and 98 petrol is ‘knock’ resistance. … 95 petrol works as well, but if your engine is powerful, it will use higher pressures that 95 petrol may not be able to withstand. If you want to be on the safe side, 98 petrol will offer your engine better protection.

Will 93 octane hurt my engine?

If you usually fill your tank up with 87-octane gasoline and you accidentally put in a higher octane blend (say, 91, 92, or 93), don’t worry. You’re actually filling your car or truck with a different blend of gas, which means it will burn differently in your engine.

Is it better to run 93 octane?

Higher Octane Doesn’t Mean Better Performance Higher octane doesn’t always give better performance. … This means that your engine will be cleaned the same by 87 octane fuel as it will by 93 octane fuel, so don’t feel that it’s necessary to treat your car to a higher grade.

What happens if you put too much octane booster?

The higher the octane rating, the slower and colder the fuel burns. If you run too much octane in your engine it won’t run very well because the burn is way too slow. If the octane is too high, the piston might already be at bottom dead center (BDC) and the fuel might still be burning.

Will 110 octane hurt my car?

EZ- Your engine is not set up to take advantage of 110 octane fuel, but it will definitely not cause your car to overheat. The higher the octane you use, up to a certain limit, the more resistant the fuel is to preignition/detonation/knocking, allowing an engine to run more ignition advance.

What octane is needed for 11 1 compression?

“With current 93-octane fuel, it is possible to run as much as 11.2:1, but the safety margin is small. At this level you can be slave to the weather. If it’s hot and humid, the water content suppresses detonation to about the same degree as the increase in detonation from the temperature increase.

What is the compression ratio for 87 octane?

8.7:1For those running 87 octane, 8.7:1 is the most that is safe with cast iron heads, 9.7 with aluminum. Race fuel, on the other hand, at 110 to 118 octane will allow compression ratios of 14.5 to 15:1 if tuned properly.

Is it bad to mix gas from different stations?

Gas stations use different additives in most cases, but there is nothing wrong with mixing stations, or even octane ratings. If you mix 93 and 87 you get 90, mix 89 and 93 you get 91.

What octane do you use for 15 1 compression?

It is a leaded, ethanol free high octane race fuel that is more than just a pretty dye package. Pro 112+ is real octane for serious racers. Provides protection for up to 15:1 compression at 8,500 rpm….Pro 112+Octane – R+M/2113LeadedStoich Ratio14.96 : 1ColorBlue4 more rows•Mar 23, 2019

What compression is best for 93 octane?

If the cylinders are sealing up well, I look for 190 psi as a lower limit with preferably 200 psi as a target when using 93-octane fuel. For every octane number less than 93, the compression pressure needs to be about 5 psi less to avoid detonation under normal circumstances.

What is the highest compression ratio for 98 octane?

This type of gasoline is advisable for car engines with compression ratios of 11:1 to 12:1. Pertamax Plus is no longer produced today and has been replaced by Pertamax Turbo of 98 octane.

What happens if I put regular gas instead of premium?

Using regular gas in an engine that requires premium could void your warranty. That is most likely to happen if using regular causes severe engine knock or pinging (premature ignition of the fuel, also known as detonation) that damages the pistons or other engine parts.

Does 100 octane increase horsepower?

Octane does not offer any better fuel mileage, increase engine horsepower, or make the engine start quicker. Higher octane only reduces the likelihood of engine knock or ping. … Because higher octane gas burns slower, it is more resistant to knock when subjected to higher RPM and cylinder pressures.

Do turbos require premium gas?

Engines with high compression ratios or turbochargers often require high octane fuel found in premium gas for optimal performance and fuel efficiency. However, the majority of cars on the road today are optimized to run on regular gas.

What is the best engine compression ratio?

Compression ratios usually range from 8:1 to 10:1. A higher compression ratio — say, from 12:1 to 14:1 — means higher combustion efficiency. Higher compression ratios and combustion efficiency mean more power with less fuel, and fewer exhaust gases.

What octane is V power?

New Shell V-Power unleaded is a 99RON octane fuel. By comparison, regular Shell unleaded is 95RON. New Shell V-Power unleaded -the power of high octane.

How do I know what octane I need?

How to identify what octane your car needs: First, open the fuel filler door. Next, look at the gas cap and the inside of the fuel filler door. One of these should have the recommended octane fuel for the vehicle written on it.