Question about 1987 Chrysler Fifth Avenue

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Why does my 87 run better on regular gas than super unleaded

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The car was built to run on 87 octane, unless you have done engine work( raised compression ) or reprogrammed the pcm run regular, you will probably get better fuel economy also

Posted on Jul 17, 2010

Testimonial: "it seems to even run better on 87 ethanol should i keep using the ethanol gas"

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2 Answers

I mistakenly put a regular gas in it when its an UNLEADED FUEL only model an automatic 1994 geo tracker


Hi!!
At the pump, when it says Regular, it means Regular Unleaded Gasoline, the one that says Super, is Super Unleaded Gasoline, the only difference between the two is the octane rating. Both will work just fine on your vehicle.
Good Day! Don't forget to rate this post!!

Sep 20, 2010 | 1994 Geo Tracker

1 Answer

Is premium gas a must for the regular 4.7L V8.


Your jeep has two engine options, one was a standard 4.7 V8 and the High Output V8. Below is the recommended octane fuel rating.
Unleaded regular, 87 octane (R + M)/2 - Standard;

Unleaded premium, 93 octane (R+M)/2 recommended - High Output
Thank you for using fixya and be safe.

Jun 29, 2010 | 2002 Jeep Grand Cherokee

1 Answer

Can i use regular gas in my 94 ford explorer


Hi!!

Your vehicle is designed to work with REGULAR UNLEADED GAS, using SUPER UNLEADED is your choice.

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Apr 27, 2010 | 1994 Ford Explorer Limited

1 Answer

I use unleaded plus ALL the time for my car is that good or not good. whats the difference between regular unleaded, unleaded plus and super unleaded? which is best to use?


THE BEST THING IS TO USE WHAT YOUR SERVICE MANUAL CALL FOR. REGULAR UNLEADED 87 OCTANE - UNLEADED PLUS 89 OCTANE - SUPER UNLEADED 91 OCTANE. UNLEADED PLUS ITS OKAY. TO USE EVERY NOW AND THEN I WOULD USE 87.YOU CAN RUN 87 - 89 OCTANE.BUT DONT RUN 91 OCTANE ITS FOR THE HIGH PERFORMANCE ENGINE.

Nov 02, 2009 | 1999 Dodge Intrepid

3 Answers

What kind of gas should i use because my manual was not in the car when I bought it?


dear friend-you must use unleaded as that is what you vehicle is desight for

Jul 22, 2009 | 1999 GMC Yukon

2 Answers

I just bought it and need to no which gas is best for it out of the three types. and if i put regular gas in, will that break it!


when you open the gas flap to put gas in it should say "unleaded fuel only" or " premium unleaded fuel only". If it says premium only use premium. If it just says unleaded then you can use normal unleaded gas. But some stations have a lower grade unleaded gas. Use 88 octane or better.

Jun 14, 2009 | 1994 BMW 3 Series

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

6 Answers

Right gas


Regular unleaded (87 octane) is the correct grade.

Jun 15, 2008 | 2000 Nissan Maxima

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