5w-20

WE3RX7 · 10-06-2008, 09:56 PM

My car has had 5w20 since new. I also run premix though. Personally, I use 10w30 in all my other RX vehicles and have even run 20w50 from time to time in the FBs. Longevity is in the premix IMHO not the oil. If Mazda wants 5w20, then thats what my 8 gets, but I'll never trust their OMP ratios from the factory... besides, the 8 has 100K mile warranty now,lol...

10-06-2008, 09:56 PM	#1
WE3RX7 RCC Addict Join Date: Feb 2008 Location: VA Posts: 1,812 Rep Power: 19	My car has had 5w20 since new. I also run premix though. Personally, I use 10w30 in all my other RX vehicles and have even run 20w50 from time to time in the FBs. Longevity is in the premix IMHO not the oil. If Mazda wants 5w20, then thats what my 8 gets, but I'll never trust their OMP ratios from the factory... besides, the 8 has 100K mile warranty now,lol...