We're all oil snobs here? I guess I missed the notice.
There's a few threads about costco oil. It appears to have good certifications and come from a known distributor. Give it a shot.
Well perhaps Im the only one! Haha
There's a lot of folks here that will use any oil that they can get for the cheapest price as long as it meets
their vehicle specification. The Costco oil - from Warren Distribution - has a number of certifications that exceed the EB specs so it'll be fine to run.
I'd give it a shot, but I managed to pick up a BUNCH of Pennzoil Platinum for considerably cheaper than I can get the Kirkland oil for in my area. They both carry Ford spec, they have SN-Plus designation and are d1G2 certified.
I picked up 4 jugs of Pennzoil Platinum for $12 CAD per 5L jug.
Costco is currently selling their Kirkland oil for $21.49 CAD per 4.73L jug in my area.
Don't get me wrong the Costco oil is a good price, but it's just not as good of a value as the oil I got on sale with the same spec's. Given that my 3.5EB f150 takes 6L of oil per change and that they recommend 16,000km (10K mile) oil change intervals, I'm good for the very near future and beyond.
I'm certainly going to watch for the UOA on Kirkland oil with EB engines and see how it performs. If it offers an advantage, I'll switch. If not, I'll keep on running what I have.
Again, give it a go and report back.