Originally Posted By: BlueOvalFitter
Does this include FORMULA SHELL motor oil? How does the additive package in FORMULA SHELL compare with PENNZOIL and QUAKER STATE'S additive package?
Formula Shell likely won't be GTL unless Shell has some giant surplus. But, the additive package of Formula Shell seems closest to that of Quaker State in VOAs, within the margin of error. Shell claims they are different products though, and I believe them.
Generally speaking, I maintain that SN/GF-5 oils, particularly within the same tier (i.e. conventional in this case) are functionally interchangeable. When it comes to Formula Shell synthetic, you're not getting A5/B5 or dexos1, of course. Whether that's a marketing decision or a technical decision, I have no idea. That being said, in any application where it meets the specifications, I'd have no concern about using Formula Shell.