Question about 2011 Acura MDX

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The MDX owner's manual says to use only 91+ octane gas. The dealer says that because I am at high altitude that I do not need to burn premium gas. Is that correct? I live in NM at 5000+ feet above sea level.

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I'd use the mid grade to be safe, you'll probably get better mileage w/premium but save that for long/hwy trips. Around town mid grade should be adequate unless you hear "pinging"

Posted on Mar 24, 2011

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What kind of gas does a maxima 2001


According to page 10-3 of the 2001 Nissan Maxima Owner's Manual:

FUEL RECOMMENDATION
Unleaded premium gasoline with an octane
rating of at least 91 AKI (Anti-Knock Index)
number (Research octane number 96)
If unleaded premium gasoline is not available,
unleaded regular gasoline with an
octane rating of at least 87 AKI (Research
octane number 91) can be used.
However, for maximum vehicle performance,
the use of unleaded premium gasoline
is recommended.

Engine "knock" is not just an unusual sound - but over time can cause real damage to the engine. You *should* use fuels with the recommended octane levels, but if you choose to use fuel with a lower octane level due to reduce fuel costs - do not repeatedly use fuel that causes engine knock. Find the "sweet spot" between the cost of lower octane fuel and an octane level that does not cause knocking. Expect fuel economy and performance to drop with lower octane fuels, too.

Good luck!

Feb 12, 2012 | 2001 Nissan Maxima

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

2 Answers

Does the 09 es350 need 93 octane gas or will it run on 87 octane


you should have a factory affixed sticker inside gas compartment cover listing premium fuel only or also listed in your owners manual. Otherwise if you notice that you're vehicle is making a pinging sound while accelerating or climbing a hill for instance then you may want to step up to 89 or 93 octane and try to avoid purchasing fuel with ethanol added it's **** and degrades your fuel quality/octane ratio

Dec 23, 2010 | Lexus ES 350 Cars & Trucks

2 Answers

What grade gas should be used ?


You should always use premium fuel on the high conmpression V8 engine. Cheaper fuel can cause a PING, and possible engine damage. 87 octane is definitely not recommended at any time, but sometimes you can get by with 89 for a small period of time.

Gas mileage and power will both be down with lower octane fuel, so do not use it all the time.

Jul 26, 2010 | 2005 Lexus Ls 430

2 Answers

Grade of gas


87 octane is just fine for this vehicle, unless you live in a very high altitude location, in which case you may need to run 91 octane.

Jun 24, 2010 | 1996 Nissan Maxima

1 Answer

CAN YOU USE REGULAR GAS IN A 2006 LEXUS GX470?


Only short term when absolutely necessary...

Your owner's manual says:
"
Fuel selection:
Select premium unleaded gasoline with an Octane Rating
of 91 (Research Octane Number 96) or higher for optimum
engine performance. However, if such premium type
cannot be obtained, you may temporarily use unleaded
gasoline with an Octane Rating as low as 87 (Research
Octane Number 91)."

Jan 04, 2010 | 2006 Lexus Gx 470

2 Answers

I am thinking of buying 2001 s40 volvo used. they have been using reg gas, but aren't you supposed to use premium?


it should say in the owners manual or inside the fuel door what the minimum octane rating is. On this vehicle, I believe the minimum octane is 91

Nov 19, 2009 | 2001 Volvo S40

3 Answers

1984 Chrysler LaBaron fuel recommendation


Premium. Gas is rated by octane lnumbers and those numbers have stayed the same over the years. Mid gas would not have a high enough octane rating for your engine.

Jul 10, 2009 | 1984 Chrysler LeBaron

3 Answers

Premium or regular gas


Fuel comes in different grades due to octane levels, the higher grade the higher octane, the higher price. If you have the owners manual or window sticker, you would see that the car was probably made to run on 87 octane (regular unleaded), I have been through the different octane levels for more than 30 years and I have decided that the cheapest runs as well as the most expensive. The higher octane will sometimes cause an engine to ping or rattle under acceleration, if this happens to yours go back to the cheap stuff and everything will be fine. That is my opinion, others may differ, but I run my BMW on the cheapest I can find and I still get 31 MPG hwy.

May 20, 2009 | 1998 Hyundai Elantra

2 Answers

Gas


Best way to check is by looking at the gas cap. If it does not say "Premium fuel only" you should be safe. Higher octane rated fuel is used for higher compression motors, and I dont belive that your engine (my guess is the 5.4 V8 should be around 9:1 compression) needs the high octane.

Mar 12, 2009 | 2003 Ford F250 Super Duty Crew Cab

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