It probably doesnt matter much as long as it meets the requirments of API SP engine testing. If you plan to keep the Bronco for a long time I would definitely use the fully synthetic motorcraft instead of the blend but I think motorcraft oil is overpriced.
I use Mobil 1 Advanced Fuel Economy 0w-30 since I live in a cold place.
Some experts like @CarbonSteel say Mobil 1 ESP 0w-30 might be the best oil to use in the 2.7 engine. Probably even more important to use an oil like that for the 2.3 since it lacks port injection. It doesn't meet ford's WSS/API resource conserving spec because it's not "resource conserving", instead prioritizing high temperature high shear performance. I don't use it though since it doesn't carry the Ford spec and I'm paranoid about the warranty. I did a few used oil analysis with the AFE oil I'm using and wear metals are low so I think it's fine, and it's $5/quart at Wal-Mart in the 5 qt jugs. With that said, I'm at less than 1% fuel dilution on 4000-7000 mile oil change intervals according to speediagniastix UAO, unlike some Bronco drivers that are reporting 3%+.
I use Mobil 1 Advanced Fuel Economy 0w-30 since I live in a cold place.
Some experts like @CarbonSteel say Mobil 1 ESP 0w-30 might be the best oil to use in the 2.7 engine. Probably even more important to use an oil like that for the 2.3 since it lacks port injection. It doesn't meet ford's WSS/API resource conserving spec because it's not "resource conserving", instead prioritizing high temperature high shear performance. I don't use it though since it doesn't carry the Ford spec and I'm paranoid about the warranty. I did a few used oil analysis with the AFE oil I'm using and wear metals are low so I think it's fine, and it's $5/quart at Wal-Mart in the 5 qt jugs. With that said, I'm at less than 1% fuel dilution on 4000-7000 mile oil change intervals according to speediagniastix UAO, unlike some Bronco drivers that are reporting 3%+.
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