Originally Posted By: webfors
Originally Posted By: tig1
Originally Posted By: webfors
I suspect for most cars, in the majority of use cases, 5w20 will work just fine. Add a little severe service, under the wrong conditions, and I don't believe it is up to the task.
Are police cars under severe service? Our local police force have Fords. They are serviced at the local Ford dealer(and have for the last 60+ years) I mentioned. They use MC 5-20, and MC filters since the early 2000s, and according to the "service mgr", failed engines are a rarity.
nah, that's ideal conditions. Oil always hot, frequent brief accelerations. I would consider a short tripper to be more severe.
My recent tow through eastern Canada, now that was severe. It's all about engine temps IMO, which means it's all about viscosity.
BufordTJustis would disagree. Scroll up to his post made at 10:15 AM.
https://bobistheoilguy.com/forums/ubbthreads.php/topics/4516018/30,000_mile_drains,_police_car#Post4516018