"synthetic" is cheap these days (Costco through warren distributing for instance) so no need not to use it. Mobil 1 EP used to mention Ford 925 about a decade back but that was dropped. The 925 spec is obsolete and is related to long life intervals (LR 24k km/ 16k mile OCI) , something you don't want to be doing anyway.
My oil of choice is Mobil1 EP high mileage when it goes on 40% off sale. The high mileage conditioners have dried up any oil seeps. Knock on wood but at 160k miles I have no oil leaks. Nothing has ever been touched (valve covers, vacuum) including the timing chain and tensioners. YMMV.
My oil of choice is Mobil1 EP high mileage when it goes on 40% off sale. The high mileage conditioners have dried up any oil seeps. Knock on wood but at 160k miles I have no oil leaks. Nothing has ever been touched (valve covers, vacuum) including the timing chain and tensioners. YMMV.