The 2005 GMC Yukon runs on regular unleaded.
The 2005 GMC Yukon-XL runs on flex-fuel (unleaded/E85).
I would use a synthetic 20/50 motor oil
mobil 1 5w30 full synthetic
Use 5W30
Use any major brand 5W20 oil.
A/C oil filter and 5W30 Oil.
You use 10W-30 from any good oil brand.
5w 30
5w30
5w20 any premium brand.
The type of oil that should be used in a 2005 Jeep Liberty is 5W30. You can switch to 10W30 in the warmer months.