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Hello, Haven't been by here in a while and curious to get some thoughts on oil to use in my '19 C7 Grand Sport. This car is driven about 400 miles a month, mostly on weekends. The car is driven very spiritedly, unlike the vast majority of these cars. Car is driven on group "cruises" in the...

Original discussion before sending this sample in: https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4735674/Testing_the_%22oil_goes_bad#Post4735674 I'm curious to hear thoughts based on this run.

Having lurked this forum for most of the past ten years, I've seen endless discussions on whether oil "expires" with age. I will soon have a data point to add to this ongoing debate; I have no idea which side of the argument is correct, nor do I care. I just did a oil run on my 1997 Camaro...

Hello, Last time I stopped by was to get input on what oil I should run in my new Focus RS. I have been on Mobil 1 5w-50 and a Fram Ultra and just completed second oil change at 10.5k (7.5k run). With the arrival of winter, I am noticing the oil is never exceeding ~170 degrees, even with my...

I have just purchased a fully optioned Focus RS in Stealth Gray, and will be taking delivery in Florida and driving it northern Illinois, then to Ohio, putting about 1700 miles on it in the next few days. Ford specs 5w-50 with the following note: "If you are unable to find an engine oil that...

I have recent passed 41k miles on my Focus ST that I've given nothing but PU and PUPPP since factory fill was dumped at 1k. The only store I've been able to find it at now no longer carries it and I didn't feel like waiting since I had already pushed the prior change out 7,100 miles. I went...

Given there is a seemingly meaningless $3 difference between regular M1 and the EP flavor, is there any real reason not to spring for the EP? Just changed the oil in my wife's Escape with the EP and Fram Ultra. Any reasons not to run it out 10k with the 2.0 Ecoboost? My Focus ST has the same...

Car is a 2013 Focus ST (2.0L Turbo I-4, Direct Injection) with 15k miles. Oil was last changed 5k miles ago with Pennzoil Ultra Platinum 5w-30. It serves daily driver duty, about 14 miles each direction to work, roughly 50/50 city/highway split. Car sees a lot of high load/lower RPM usage...

Just picked up some of the new Ultra Platinum 5w-30 for my Focus ST with 10k. Used the "old" Ultra after FF was dumped at 1k. This car sees a 30 mile round trip commute each day, the roughly 50/50 split city and highway. I wait for the oil to warm a bit before thrashing it, during which it sees...