Question about 2007 AJP PR4 125 Enduro

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Grade of fuel

What grade (octane rating) of fuel should I use and why?

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Use the minimum octane that does not cause your engine to knock. Anything more is wasted money.

Posted on Nov 10, 2008

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Fuel Grade for 1925 Chev.4


Octane is a measure of how smoothly the feul burns, You can never have too much octane. The reason you get more power from high octane is because it burns fractionally slower, allowing more pressure time to push the piston. Low -er octane has more tendency to explode (in pockets) versus smooth burning, resulting in popping or pinging, more unburned fuel comming out the exhaust, and potential damge to piston or valves. So I did not actually answer the question, but hope I helped. Use a little mid grade and listen to the engine under power, (rev engine), for pinging or popping. If it sounds smooth, you should be good. If not, upgrade.

Apr 16, 2013 | Cars & Trucks

Tip

Why to Use a fuel with the lowest required octane in the car?


Low-octane "regular" gas is usually all that is required. Octane is only a rating of the fuel's resistance to engine-damaging pre-ignition ("knock") in high-performance engines (that few people have). Low octane gas is less expensive and a better value if that's all your engine requires. Best case scenario you're wasting money by filling up with a higher than recommended grade of gas. Worst case scenario that high octane fuel is building up damaging carbon deposits in your engine because it's not being burned as completely as lower octane fuel would be. Check your owner's manual to be sure. Modern high performance cars will sometimes recommend higher octane fuels because they are engineered to use those fuels. The use of lower than recommended octane will not make your car explode, the ECM (Engine Control Module, aka:computer) will adjust the fuel injectors and spark timing to save the engine and compensate for you cheaping out at the pump. Those adjustments will consist of retarding the spark (reducing power and efficiency) as well as dumping lots of extra fuel into the cylinders to cool them, potentially costing you more than getting mid grade or premium IF that's what your car requires. NOTE: Remember that engines need less octane at higher altitudes. If your engine does not "knock" on regular, paying more for a higher octane rating is a waste since the increased octane makes no significant improvement to gas mileage and it is no better for your engine. All available fuels have detergent and additive packages. This will help.good luck.

on Mar 08, 2010 | Toyota Prius Cars & Trucks

3 Answers

I just bought my lincoln ls yesterday and it was working really good but i put regular gas in it not the premium and it started acting up on me, it started backfiring really bad. what can it be? the...


all you need to do is to use the right fuel gas grade for your car check the manual it will tell you not all cars take any tipe of gasoline youll be fine just use the right grade.

Feb 24, 2011 | Lincoln LS Cars & Trucks

1 Answer

Regular unleaded or Premium ?


This is a wide range of fuel types. Minimum Octane level to run decent is normally 87. Up in the northern areas and hilly states I've seen this a little lower. Typically your choices are 87 octane, 89 octane and 93 octane. I recommend using the 89 octane or mid grade to get the best mileage and consistent performance from the vehicle. You will get better mileage from the higher 93 octane or Premium but this is off set by the increased soot and build up over time and the mileage isn't that much better to justify the cost between the Mid and Premium grade fuels.

Aug 03, 2010 | 1995 Volvo 850

2 Answers

Oil grade


best oil would be Penzoil, or Penrite. Fuel i would go for premium, with the highest octane rating. minimum 95

May 13, 2010 | 2004 Honda VT 750 Shadow Aero

1 Answer

Fuel recommended for Lexus ES 350


92 or 93 octane. In my area of the country we have regular, super and premium thus the 92 or 93 octane fuel is called premium.  I would assume that this grade would be what you are calling super premium.  Basically it is going to take the best quality gas that they sell at the station.  Let me know if you have any other questions.  Thanks for the opportunity to help you and thanks for an honest rating.  I hope you continue to use FixYa in the future for all of your automotive questions!

May 24, 2009 | 2007 Lexus ES 350

1 Answer

Grade of fuel


Use the minimum octane that does not cause your engine to knock. Anything more is wasted money.

Nov 10, 2008 | 2004 Vertemati C450

1 Answer

Fuel grade


Your Solara requires 89 octane regular unleaded.
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Nov 06, 2008 | 2002 Toyota Camry Solara

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