- Dec 4, 2005
My last oil change in my Caprice at the start of the winter I put in Mobil 1 high mileage 5w30 (on sale for $29.99 CND - 5qts). I had to top up a qt and ended up buying another 5qt jug as it was on sale again and nothing was worth buying a qt of, so I still have the rest of that jug here in front of me. It's rated SN plus, ACEA A5/b5 and now that I look, I see the date is 2018. Today I went to Canadian Tire and ended up buying filters for both cars (Mobil 1 EP filters on sale) and a 5qt jug of Mobil 1 EP 10w30 which I am going to run in the 350 Oldsmobile for the summer since the Caprice only gets driven occasionally in the summer. Since I'm a nerd I put both jugs side by side and notice the EP is only ACEA a1/b1 and API sn (not an plus). That surprised me. Then I realized this jug is from 2017. Mobil 1 shows the EP is rated SN plus now, and the high mileage doesn't show those specs online (but the jug does so they just haven't updated yet). Either way I'm not returning the oil or anything, I'm just curious if it's known whether the oil actually changed for the new certifications or not. I'm not going to run it for 25,000kms like it's rated, but it was the best oil I could get for the price so I bought it for $34. I will likely run it through the summer and change it next spring after it sits all winter.