I am using a full synthetic (Group IV PAO base stock) 10w40.
I have brought the oil to the dealer to use for my free oil changes, no issues from the dealer.
Change every 5K, no consumption issues. 15K on truck
Have over 600K miles using the same oil (5K oil change) in 3 different TDI Jettas NEVER burned a drop.
5w30 just may be too thin for some applications.
Fuel mileage should be better with a 5w30 vs a 10w40, but oil consumption could/may be higher.
My .02
Ken
I have brought the oil to the dealer to use for my free oil changes, no issues from the dealer.
Change every 5K, no consumption issues. 15K on truck
Have over 600K miles using the same oil (5K oil change) in 3 different TDI Jettas NEVER burned a drop.
5w30 just may be too thin for some applications.
Fuel mileage should be better with a 5w30 vs a 10w40, but oil consumption could/may be higher.
My .02
Ken