Honda Car Forum

My 2005 automatic TSX Acura requires highest octane gas. Can u use lowest w/out any problem?

No it will reduce your performance and it is not good to use low fuel in such a high end car because it may be cheaper but it could mess up your car.

read your owners manual

OK, I just own two new high end cars...the dealer told me that even though I usually run 93 Octane gas I can run the Medium Octane gas in them without hurting them. Not the low one, but the Medium one. Plus, I usually use a gas booster like STP or one that comes with the gas every three of four tanks. I've always had foreign cars and never had one that I had any problem with. I asked the dealer because of gas prices and both my cars are V8's. I was just curious, I still us 93 Octane, but I just wondered. I have a new Mercedes, amy Hubby has a new Audi and we share a 2007 Cadillac SRX Crossover.

No. You have a powerful 4 cylinder engine making more than 200HP. It needs premium to function properly.Premium gas is 91-96 octane.Almost all Luxury and sportscars require premium.

no...if you can't afford the gas, don't buy the vehicle...

according to the owner's manual it recommends 91 octane and not to use below 87 octane. I own a 06 6MT TSX, bought new 11/17/06, with almost 48,000 miles. I do mostly highway driving, average 32-35MPG using regular (87) gas. My car has more than enough power and did not lose performance.

In my MDX I use 93-96 but it shouldn't do anything to a tsx to use cheaper. In a tl or rl it would not be too smart