Originally Posted By: Jaymus
I don't like either one. My F150 had been ran on Kendall for many years before I got it, it's covered in sludge on the outside and the inside must be nasty because my oil gets black, and I mean BLACK, by 750 miles. Lots of cleaning up to do. GTX was used religiously in a newer engine, 3800II GM Buick Park Avenue (2000 model), 3000 mile or LESS oil changes. Front valve cover started leaking and it ended up consuming 3/4 a quart every 2500 miles.
I've used GTX a lot. Never had anything just blow up on me, but I think there are better choices out there.
If I had to pick... shew, I'd actually go with the GTX. Don't worry, either way, I wouldn't be sleeping well at night. Obviously no true science here, just what I've seen, but that's all that's posted in this thread, anyways. The base model Kendall is a synblend? Is that true? If so, I'd probably lean towards the Kendall, actually.
This is what I gather from the information you have provided. Your F150 in nearly 20 years old and who knows how the previous owner/owner's maintained it. The "sludge" you are experiencing is unlikely directly oil related.
Please do not base your purchase on a "synthetic blend" label base oil's are only a part of the formulation for a blender to meet specs.
I don't like either one. My F150 had been ran on Kendall for many years before I got it, it's covered in sludge on the outside and the inside must be nasty because my oil gets black, and I mean BLACK, by 750 miles. Lots of cleaning up to do. GTX was used religiously in a newer engine, 3800II GM Buick Park Avenue (2000 model), 3000 mile or LESS oil changes. Front valve cover started leaking and it ended up consuming 3/4 a quart every 2500 miles.
I've used GTX a lot. Never had anything just blow up on me, but I think there are better choices out there.
If I had to pick... shew, I'd actually go with the GTX. Don't worry, either way, I wouldn't be sleeping well at night. Obviously no true science here, just what I've seen, but that's all that's posted in this thread, anyways. The base model Kendall is a synblend? Is that true? If so, I'd probably lean towards the Kendall, actually.
This is what I gather from the information you have provided. Your F150 in nearly 20 years old and who knows how the previous owner/owner's maintained it. The "sludge" you are experiencing is unlikely directly oil related.
Please do not base your purchase on a "synthetic blend" label base oil's are only a part of the formulation for a blender to meet specs.