I've been stalking the forum for a few months and have built a stash of around 180qts of oil.
I've been running castrol syntec 5w20 in my truck since new. I'm running 5w30 synpower in the yukon. I run 5k changes because they are easy to remember.
I've got enough stash for around 3-4 changes of synthetic per daily driver. My issue is that a friend of mine gave 6 cases of SM rated ecopower syn blend oil. I've got 2 cases each of 5w20, 5w30 and 10w30.
Should I use up the SM rated / older ecopower oil first or keep using the synthetic for a couple years and then start with the ecopower blend?
I know each should be adequate or 5k and that oil doesnt have a true shelf life but I want to be smart with my strategy.
I've been running castrol syntec 5w20 in my truck since new. I'm running 5w30 synpower in the yukon. I run 5k changes because they are easy to remember.
I've got enough stash for around 3-4 changes of synthetic per daily driver. My issue is that a friend of mine gave 6 cases of SM rated ecopower syn blend oil. I've got 2 cases each of 5w20, 5w30 and 10w30.
Should I use up the SM rated / older ecopower oil first or keep using the synthetic for a couple years and then start with the ecopower blend?
I know each should be adequate or 5k and that oil doesnt have a true shelf life but I want to be smart with my strategy.