RotaryLover
New member
I have a Mazda 3 2010 with the 2L. I've switched the dealer's semi-synthetic 5w20 oil with Amsoil 5w20 synthetic (XLM) and I noticed that I get way less mileage compared to before. Also it's a bit more rough on cold start up and the muffler sounds a bit more louder than before (might be me...). But at normal temp. everything seems fine except the mileage. I thought that the oil level were high (that cable dipstick is hard to read lol) but the place where I did the oil change told me it's fine...Before you say it, my driving habits didn't change. What could be wrong?
I really did get less mileage. I used to get at least 400 km for 1 tank. Now I get 360 km
I really did get less mileage. I used to get at least 400 km for 1 tank. Now I get 360 km