T Nation

Used Car Engine Issue?


#1

I'm sure a few of you T-Nation members would have some good opinions or advice for me.

I'm getting a 2003 Acura MDX from my family and have been informed my step-dad has been putting regular fuel into it for about 5 years, whereas it's a premium recommended engine. Could this cause any issues?

I have been told I should have the engine cleaned out and start using premium fuel after the process. Would it be worth the cost of the cleanup?


#2

here is the deal.

If the car does not make a knocking sound running on regular, its fine. The reason some cars require a higher octane rating fuel is that they run a higher compression. Octane is the resistance to burning (combusion). A high compression engine may therefore prematurely combust low octane fuel before it reaches Top Dead Center (TDC) of its stroke. If this isnt happening I would keep using regular.

The only reason to have the engine "cleaned" would be if you were using crappy walmart / such fuel that does not contain the detergents and the injectors / valves had become clogged. Run a fuel injector cleaner and always use a good quality gasoline like Shell/BP/Mobile.....

hope that helps....


#3

Just stopping by and saying I like threads like this.

My car knowledge only goes so far as changing tires and fluids. Other than that I'm at the mercy of my check engine light. lol


#4

Agreed with Ratchet

My 2 Cents: Make sure you regularly change the oil and do the required maintenance.


#5

It's a 2003 Acura MDX, right now the engine sounds pretty bad when starting it up, I don't know much about car mechanics so I couldn't say what the problem is or if I could attribute it to the regular gas usage.

I'm taking it in to get a detailing in a few hours, I'll see if I can get a video with decent sound quality up of me starting it.

I don't believe I've heard any knocking in the engine, I have read Acuras have a knock sensor to prevent it, I'll look for a source later or if anyone else can confirm this?