Picked up a 2000 GMC Yukon XL (suburban) 5.3L 2WD. It has 141,000 miles on it. it will be mostly highway miles (100 to 150 miles)but thats may 2 to 3 times a week and local 10 to 15 miles daily if driven daily. I never used synthetic and want to try it out. I do not have a owners manual yet but ordered one. It has a vavoline sticker in the vehicle that says 10-30w. Far as i know the previous owner changed it at 3,000 miles. I am going to be going through everything on the vehicle to be sure everything is up to date and in good shape.
What do you recommend me using?
What do you recommend me using?