I use this for my 06 ss supercharged cobalt highly modified to 400hp with 105000 miles have used Mobil one for the whole life of the vehicle did a compression test the other day was only 2psi of from factory I'm positive it's fire to the constant use of Mobil one helping the engine stay youthful through out it's life Mobil one is all I'll ever use for my vehicles

Purchased it brand new & is now just a work car....I drive 100 miles a day round trip and have used Mobil 1 Extended Performance 5W-30 since the Toyota was at the 14K mile mark....Well the odometer now reads 290,000 miles and it does not leak a single drop whatsoever & has never had any component replaced nor cracked open for a bypass... I use it in my other two vehicles & will never use anything else.....Best motor oil in the world

My last vehicle was a 2000 Ford F-150 with the 5.4 engine . From the first oil change a I always used Mobil one , it had 256.000 miles on her and was still running strong , when I traded her for new F -150 . I will continue to use the best synthetic oil available Mobil one . Thanks for such a great product .

I have used Mobil 1 for as long as I can remember and never had a problem with any of my cars or trucks. The first time I used Mobil 1 I noticed the engine ran a bit cooler and the gas mileage improved. I also use Mobil 1 Oil Filters and Mobil 1 Grease. I change the oil between 7000 & 8000 miles and the oil comes out of the engine almost as clean as it went in the engine. I know this because I change it myself. A Friend of mine had a 1995 Ford Thunderbird with over a 100.000 miles and the oil was always black as coal. I told him I would change oil 4 times in a row for him using Mobil 1 10W-30 and if the oil did not start getting clean he would not owe me a dime for the work or the oil. He agreed and after the fourth oil change We could barely see the oil on the dip stick. Well in the end he was happy and I got paid. The only sad part about this story is shortly after we did the experiment he was rear ended on an exit ramp and the car was totaled and thankfully no one was hurt. But too this day Mobil 1 Oil and Mobil Oil Filters are the only products he will put in his cars. P.S. Mobil 1 Oil is the best cold weather oil that I ever used! Thank"s For Taking The Time Too Read My Review, Pat Regan Throop Pa.

My daughter had a 2008 Subaru outback that by design, always used some oil. However a few years ago the timing belt broke and ruined the valves ( another story). after this it smoked and used 1 quart of oil every 1000 miles. I tried everything it just had a lot of blow-by sucking thru the PVC. Just as I was about to give up, the Mobil 1 10w40 oil and the oil usage cut in half. I bought the extended performance oil and she now uses about a quart every 4000miles when I change it. I am not kidding when I say I was looing at rebuilding this motor. at 132000 after getting 2 catalytic converters under the PLEV warrantee of 150,000 miles. Now its as good as new oil consumption wise and im happy to say we have zero converter issues at 174800 miles. Unreal!

I've been using Mobil 1™ Extended Performance 5W-30 for about four years. Really an excellent product. I like the fact that my oil changes are only twice a year, but I've never felt completely comfortable with the thought of going near 15,000 miles between changes. Close to 10,000, I tend to get nervous. Has anyone tried going 15,000? I'd like to hear some comments. And guarantee, schmarantee. What good is a guarantee when your engine is baked? Thanx.... philip

I just changed my valve cover gaskets on my Nissan Titan 185,320 I have used Mobil1 for the last 13 years if you could see the photos under the vale covers o sludge o build up it's amazing still shiny . You can't go wrong . I have owned this truck since new the motor is in perfect condition and so clean inside.

I've been putting nothing but Mobil 1 in my cars after talking to an engine specialist in the Ford SVT group who said that they only run Mobil 1. It has never given me a problem and my 2000 Ford Expedition is coming up on 300K miles. 1 engine - 1 motor oil. Save yourself some money and only use Mobil 1.

Vehicle: 1997 Pontiac Trans Am WS6 - 5.7 Liter - 6 Speed Be it summer or winter, Mobil 1 Extended Performance (in my case: 5W-30) has never let me down. Protection to 15,000 miles is extraordinary. And at 4,000 miles, the oil still looks very clean. A proven attribute to the Mobil 1 (M1-111) Extended Performance oil filter. (and K&N air filter) A match made in heaven. Despite my confidence in this oil going the 15,000 miles distance, I choose to drain and refill with new Mobil 1 Ext. Performance along with a new Mobil 1 Ex Perf. oil filter at 3,500 to 4,000 miles. I just feel better about this... you know... the "peace of mind" thing. I can't help but wonder what other astounding oil and fuel breakthroughs await us car & truck lovers from Exxon-Mobil in the future. Thanks.

I have two Fox body Mustangs and have been using Mobil 1 since my rebuild. Best oil ever and I honestly believe using Mobil 1 helped prolong the use I had over the original setup I had in the vehicle. All around good stuff that is formulated in Mobil's lab and they are terrific with their product lineups. I don't ever second guess them at all! Car feels better everytime I do the oil change in either of the Mustangs with Mobile 1.