Asked by Sep 14, 2016 at 01:09 PM about the 1999 Honda Accord

Question type: Maintenance & Repair

Can I use 10w40 in a 1999 Honda Accord

5 Answers


You can,but i think your car use,s 20w50,10w40 is heavy oil,


Absolutely you can especially if it is a higher mileage engine, if you live in hotter climate you won't notice much differance but if you live in cooler climates you will notice some drop in fuel mileage.

1 out of 1 people think this is helpful.
Kelly Mayo

and use syn.oilsIf you want to put 5w-20 in there, then feel free to do it. Honda actually reccommended 5w-30 in your engine when it was new, then several years down the line, they changed the reccomended viscosity to 5w-20. 5w-20 is a little thinner so it will give you better gas mileage (barely noticable). There is no harm in switching right now.

2 out of 2 people think this is helpful.



If you do want to use synthetic oil, first check the entire engine for any signs of oil leaks, and have them resealed. Synthetic is way more expensive than regular oil so you wouldn't want to be wasting it through oil leaks.

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