Quote:
Originally Posted by mayno
http://www.mobiloil.com/USA-English/...rformance.aspx
I disagree: why would Mobil 1 advertise their extended performance oil to last 15,000 miles? Don't oil companies make MORE money if we all changed our oil every 3K miles (like Jiffy Lube promotes)???
Whenever a company states a maximum (i.e. 15K), they always factor in a buffer. I wouldn't be surprised if their synth oil really lasts 18-20K, but mention 15K instead.
Synth oil is FAR SUPERIOR to dino oil and can easily last 4X to 5X longer!
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yeah... there is two things about that.
First, Mobil will obviously rather you buy their oil less often than some competitors at all, so, they can tell you that the oil will last that long and you will buy it because of the claim and the thought that you now have to take less time/hassle/money with regards to changing your oil. It is a sales feature.
Second, maybe the oil does last that long and you won't retire the engine running it that long... however, will the engine run as clean? will it be full of sludge inside and experience reduced power, increased oil burning, increased deposits, etc. The point I am making is, if you listen to that 15,000 mile stuff, will your car still be running and feeling like brand new at 100K miles like the guys who change every 7500 miles or will it be a dirty pile of crap that is still running??
Again, I say this... new oil or new engine? Especially for the 335i guys who are running 230 degrees F ? By the way, if you have 15,000 mile old oil in your car, I hope you aren't driving it past 3,500 rpm too much...