So I used to have a 2010 VW Passat that was an oilaholic.

I still have some bottles of Mobil 1 0W 40 left over from that experience.

I have the V-6 engine do you think it would be a problem to use that oil or should I go with the oil that Acura recommends?

 

I think Honda/Acura has probably done a fair amount of testing and if they recommend using 0W-20 then it's a good idea to use that. If they give suitable oil viscosity ranges to use then anything that meets the requirements would be acceptable, but they only list the 0W so I wouldn't deviate.

It's not worth the potential damage or lack of efficiency of your engine to use a different oil just to save money or because you have some left over.

 

I would stick to what Honda recommends. Oil viscosity is not something you want to take a chance on your engine especially considering the extended oil change interval with the synthetic. Mobil 1 0W-40 is typically used in German turbo charged engines. Your 2010 VW probably has a turbo-charged engine that runs hotter and requires "heavier" viscosity oil. The 0w40 would be too "heavy" for your TLX engine. In addition to potential damages on engine components, you will experience a decline in gas mileage (MPG). Any savings from using the leftover oil will be offset by higher consumption of gas.

 

Related questions...

I was at the dealership today. Got time to burn, so hung out in the parts department. I noticed that they have Acura 0W-20 only in full synthetic. I didn't see any blend or non synthetic for that grade. Does this imply Acura Always use synthetic for the A service?

 

The 0W-20 is to help emmissions standards and stuff. I like to use 5W-20 since I'm in FL, or 5W-30 since the 3GTL, MDX have over 100K. I use Mobil 1 Extended Performance Gold Cap. It's 15K change intervals but I do it every 10-13K with a new oil filter and top off 1/2 way though.

Using the Euro 0W-40 won't do much for your car. If anything I'd sell give it to a friend who might have oil to trade you! The Euro is a great formula, but it's too thick at operating temp and will reduce MPG and maybe power. If you are in a pinch and need to top off a little bit it'll be fine.

The HTHS factor with the euro 0w-40 is what most of the engines that consume oil need, shearing resistance. It has a HTHS of 3.8 for M1 Euro 0W-40. The HTHS of 5W20 M1EP is 2.75 vs 0W-20 having an HTHS of 2.7. The higher the number, the better for long term applications where the oil is getting destroyed.

Honda Engines have been known to be gentle on oil for the most part with little to no consumption. You shouldn't need to top off a ALL until you get to 100K miles between oil changes.

Acura programs the built in computer for use with Conventional oil, even though acura sells synthetic. The computer won't know the difference and will guide you with conventional oil.

You can use either, I used Dino until around 100K on the 3G TL and switched to synthetic. 50ishK on the MDX when I switched, 40K on the 4G TL and 5K on the accord.

Most dealerships bulk buy 0W-20 that comes in 55 gallon drums. They charge like 3 dollars a quart and the rest in labor for $29.99 or more. You'll see it on your service invoice.

 

ive used 0w-40 in my TL with no ill effects.

0w-40 is a true synthetic.

 

and people telling you to stick to what honda recommends doesnt even know what the 0 stands for. or 40, for that matter.

 

My Miata is recommended to run on 5w-20 in North America. In Australia, they use the exact same engine and recommend (if I'm not mistaken) 10w-50 oil. I don't remember the exact oil weights, but for the same engine, Mazda recommends 4 completely different oil weights around the world. I can dig them up next week, if anyone cares. It appears it comes down to what climate you live in.

That being said, even though Mazda recommends using 5w-20 here in NA, the previous owner of my car put Amsoil 0w-40 in it religiously since his first oil change. I should add that the Miata now has 105,000km, has been supercharged for the last 35,000km, and runs like a top. Adverse effects? Likely slightly lower fuel economy due to the 40 weight at operating temps, but overall zero issues. This car doesn't get babied either. It was built to be driven, with the previous owner modifying anything and everything you can think of on the car, and being a certified racing instructed, you can bet he put it through its paces.

 

Click the link below, it gives additional information and sheds light on oil viscosity. Not sure how truthful it is, but I'm still doing research.

Truth about 5w-20 and 0W-20 Motor Oil - technical facts