I have been using M1 EP for decades now. My vehicles have 160000 miles to over 400000 miles using M1 EP. I use 5W 30, change intervals at 10k miles, oil protects engine perfectly. I once blew my radiator in a Ford Focus and drove 40 miles with no coolant. Mobil1 EP protection is outstanding

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

My brother who has been a professional mechanic for 25 years, recommends Mobil 1 Extended Performance oil. My dad, who has been an avid Havoline and STP fanatic all our lives, also uses and recommends Mobil 1 Extended Performance. I've been using it in my turbo charged Volvo, my normally aspirated Saturn Sky, and my daughter's Honda Civic for over 2 years, changing the oil and filter at 10 -15,000 mile or 1 year intervals. I am a fanatic about my cars and only want what is best for them. (I was unaware until today that Mobil 1 had filters, so I've been using another premium brand.) The oil is very black which tells me it is doing a good job of keeping my engine clean, and it still runs out thin when draining. Also, after changing the oil, on first start up, there are none of those few seconds of engine clatter waiting for the oil pump to refill and pressurize like there is with conventional oils, indicating that the oil has left a protective film in my engine. I'm impressed. I do have a question; my Saturn Sky (no turbo) has always had lots of valve clatter. It may be normal, I don't know. It currently has 75,000 miles on it and there is no valve adjustment on this engine. Would Mobil 1 High Mileage help with this? It's a high revving engine so I don't want to do the wrong thing.

I purchased my '05 Corolla with 18k miles on it in 2007. I've used Mobil 1 Extended Performance 5W-30 since then. My engine still purrs at 258k miles as of March 2018. I have seen a small reduction in performance and fuel mileage in that time frame, but that is to be expected. My engine does not burn oil. I just wish the car would go bad so I can upgrade to something more roomy! Corolla recommended oil change is ever 5k miles. I do the oil changes myself. I change my oil filter every 5-7k miles. I change my oil every 10-16k miles.

I use this oil in my 2008 Lexus GS350 that has over 300,000 miles on it. The cars runs like it is brand new so I am very happy with the product. If you like taking car of your car like I do use this oil and save by not having to buy a new one unless you want

In my unbiased opinion I strongly believe there's no other synthetic motor oil out there that you can trust like Mobil 1. Let's face the facts, this company has been developing and researching synthetics longer than any other company currently out there. That is why my 2007 Toyota Camry (newly purchased, first and only owner) has 342k miles on it, and still rides and feels like when I purchased it in 2007. The dealership that I service my car in told me that Mobil 1 is very good stuff for longer intervals and engine protection. They also said it wouldn't surprise them if my engine goes over 500k without any engine damage or even terrible wear. Also note that I did not switch over to the Mobil 1 High Mileage because I'm the only owner and I've only put Mobil 1 synthtic since first oil change in 2007. Instead, I switched over to the Extended Performance to stay out of the service department and save a little money. I commute every day 200 miles and I'm not one bit worried that I will get stuck on the side of the road do to engine failure. Thank you Mobil 1 for giving me the peace of mind of not having to worry about being stranded! Hope my review helps you decide which synthetic oil to put in your vehicle if you want to keep your vehicle until the wheels literally fall off!

I want the best possible oil I can buy for my engines and have used Mobil 1 for many years.

Best motor oil I have ever used! Also use the filters to match!

Keeps my car cool, if my car great I will confidently go places for Iong trips.

Have used mobil 1 oil for years. Previous truck was a tundra. Never had an issue with the engine.