I have a 2008 Mitsubishi Lancer GTS. (Not an EVO) does it require premium gas or am i ok with regular 87 octane?

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yes....87 is perfectly fine and should be used all of the time with confidence. The higher octane fuels can sometimes help with a knocking engine but are mostly used for higher end vehicles.

Ok the 2002 Maxima 3.5 requires premium fuel 91 octane. According to the owners manual for optimum performance use 91 octane, you can use 87 octane unless you get pinging sounds. Sounds like you just need to use the proper octane. Occasionally I will run regular 87 and can really feel a loss of power. When I use 91 octane the car is a rocket ship.

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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.

Premium gas is still unleaded. Using a higher grade gas (ie: 89 or 91 octane) isn't going to hurt anything, and it isn't going to help anything either. You should stick to regular 87 as the higher octane rating gas isn't giving you any advantages.

yes and you can go to autozone to get the parts and a step by step brake service manual with illustrations

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.

HI. i recommend using the premium in this vehicle. This will ensure optimal performance. The fuel system will accept the regular blend as well but, this is not what this vehicle was engineered for. the regular blends octane level is not sufficient for optimal acceleration and overall performance.

Please rate and god bless:)

Regular unleaded (87 octane) is the correct grade.