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I am getting my first oil change on a used 07 acura tsx through my mechanic who specializes in honda/acura which i purchased early this year and i am going to use synthetic oil- he is planning to use an oil called liqui moly- ow-40.

Is this alright even though the recommended oil is 5w-30 ?
 

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There is no 0 weight oil, it's 20 weight. Dealerships recommend 0w20 and 5w20 now because it can technically improve gas mileage, but in reality the improvement may be around .5MPG, yet the oil is a good amount thinner so it wouldn't protect as well when things are hot. I personally wouldn't dare run 5w20 in a car designed for 5w30.

0w40 will be thicker than 5w30 at operating temperature, but thinner at cold startup (so, theoretically better in every way). If it's good oil, I don't see why not.

Stan
 

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Liqui Moly is an oil additive. Why is he suggesting it? Unless an engine has some inherent issues, there's no need to add any oil additives. My personal oil of choice for the TSX is Pennzoil Platinum 5w30, but any name brand 5w30 will do. As a general rule of thumb, if your oil change intervals are 5k miles or below, then name brand conventional (dino) oils are sufficient. If you push the intervals past 5k miles, then synthetics make more sense.
 

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i tried liquid moly in my first 2 oil changes, engine is at 150k, i dont think it made a huge difference if any at all. Im also running m1 at the first oil change. No leaks or engine issues. As I had no scientific way of even measuring the results. I would say dont bother.. my last 2 car also ran m1 for over 100k and had no issues

Only place i use 0w40 is on my bimmer, m1 0w40 is certified on the bimmer.
 
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