IMHO, these four things in exactly this order:
1. Engine Lubrication (Does it meet the OEM spec?)
2. Protection (I want my engines to last!)
3. Cleaning/additive packages (Can be a real+)
4. Cost/benefit ratio (Anybody can change every 3K & pay $10/quart: but, do you really need to?)
So, with no problems as to whether a possible Warranty Claim is going to be compromised by wrong grade or wrong interval...
My answer (in a decidedly mild climate) appears to be Penzoil 15W-40 LongLife and OEM filters (or better) for year-round use.
Opinions?
1. Engine Lubrication (Does it meet the OEM spec?)
2. Protection (I want my engines to last!)
3. Cleaning/additive packages (Can be a real+)
4. Cost/benefit ratio (Anybody can change every 3K & pay $10/quart: but, do you really need to?)
So, with no problems as to whether a possible Warranty Claim is going to be compromised by wrong grade or wrong interval...
My answer (in a decidedly mild climate) appears to be Penzoil 15W-40 LongLife and OEM filters (or better) for year-round use.
Opinions?