Curious what my family here thinks of so called extended performance / extended range motor oils like The Mobil One Extended Performance - - - they advertise that you can go up to 15,000 miles between oil changes "guaranteed" - - - - last few oil changes I have been using this product and changing it every 5,000 just like I would with regular Mobil One and I fully intend to keep following the owners manual and changing every 5,000 (changing it this weekend)
I am just curious to know what you think of oils like this? Would you feel comfortable running them as advertised for a good amount longer that normal Mobil One? or do you think it all just marketing hype for what is probably exactly the same synthetic in a different bottle
Also if you did run it longer would you also wait to change the oil filter or would you still do this at the normal recommended times?
I must admit when I do change my oil it still looks pretty darn good - even when it has been 5000 miles it can be hard to read the dipstick in bad light - - not at all like the old days where the oil got black as tar
So anyway - what say thee"