First post here. Grateful for the overwhelming info and depth of knowledge! I have lurked a while and thought I'd join, contribute & ask questions. Did two changes since Saturday:
1972 BMW 2002 Unknown mileage
Out: Castrol GTX 20w50, Mahle OC25 filter
In: Valvoline VR1 20w50, Napa Gold (Mann/Hummel) 1374
2011 Toyota Highlander v6 99,985mi
Out: Toyota OEM 0w20 synthetic, OEM filter
In: Napa 0w20 synthetic, Napa Gold/Wix filter
The oil in the 2002 was old but low mileage. I need to adjust the valves soon.
The Highlander has had a diet of only OEM oil aside from one M1 change a while back. Having discovered the value of Napa synthetic oil, I thought I'd try it out this time.