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I am an owner that only worries about my engine while I own my car. Reading an article about Mobile 1 (100,000 mile test with no oil change when introduced) I decided to only change oil myself every 100,000 miles. I did this thinking I would sell the vehicle before I changed oil. If I went over so be it as I added new oil as needed. The 1st car was a1960 283cu-inch Chevy Biscayne (Mobile 1 intro 1974) sold running good with original Mobile 1 in 2016 with 100,000 plus 12,000 speedo roll over miles. The 2nd car was a 93 Mazda MPV, purchased 2001 with 200,000 miles, filled with Mobile 1, then instructed my daughter to only add Mobile 1 when low and never let anyone change the oil. It was running great at 300,000 miles when a deer hit her and insurance totaled the car. New 97 Dodge caravan running well at 85,000 when traded for new 2005 Dodge caravan still in use and running well at 86,000 miles. Used 1996 Toyota Tacoma truck purchased 1999 (22,000 miles) still running well at 84,000 miles. Mobile 1 installed at acquisition and no oil change after that.

I have been using this oil for 6 years in 5k mile intervals and it’s been amazing. The weight is perfect for Florida weather but also performs really great in the cold. I’ve worked in a dealership with 5 European brands all of which use 0W-40 for specific cars. Highly recommend the product to anyone looking to use it on their own car.

I've been using Mobil 1 0w40 on my 2003 Mercedes E320 since the day I bought it and currently at 259,000 miles the engine still runs great, doesn't burn or leak a single drop of oil and doesn't have any ticking noise. Last month i checked the cylinders with a borescope and to my surprise the crosshatches from the factory were still visible on the cylinder walls! Proof of a very superior oil! Here's to another 100,000 miles!

No I don't work for Mobil or its affiliates, I was simply exhausted with scanning through the marketing materials presented by the majority of engine oil manufacturing. Therefore I learned what all those specifics mean related to engine lubricants mean and whittled them down to this one very simple equation: Pick the synthetic lubricant which has the lowest possible thickness at cold temperature rating (40 deg C) while also being able to maintain at least 10cSt thickness at operating temperature (100 deg C). Mobil 1 0W-40 was able to achieve all three of these requirements 1) Synthetic lubricant (uniform molecules which have been purified 2) Viscosity - Thickness at 40 deg C = 70.8 cSt 3) Viscosity - Thickness at 100 deg C = 12.9 cSt Therefore I was able to choose one single lubricant for all my passenger vehicles, which is available locally without special order. Those looking for a go-to standard engine oil would find Mobil 1, 0W-40 one of the best alternatives for meeting this requirement. I will modify this response, once I am able to perform lubricant analysis at my next oil change

I have use Mobil1 since 1986 in my Volvo engine and it is the only oil that i can accept to my car. Under oil cap and under valve cover, i can see the very clean, very shine engine. No any sludge, and no dirty. Engine is clean like new. My engine have more than 372000 miles behind, and it still works very well. No leaks, no problems with valves, no emission problems. Even when cold start, engine does not sound bad. So this is oil that i can trust, every day, cold or hot temprature.

I purchased my Jetta new in 2011. I change my oil every 10,000 regularly using only Mobil 1, 0W-40 and I am at 310,000 miles without any issues with my engine in all that time. I plan on going to 400,000+ miles. If I ever buy and new car I will definitely use Mobil 1 for that one as well.

First time I used Mobil 1 on my 86' Porsche Carrera I was surprised to find that the oil pressure settled down into its fully warmed proper range within 60 seconds of starting the engine from cold in cold winter. This was something that took ten or more min. with my previous oil fill. Seeing that most engine wear happens when oil is cold before it warms into its normal range of viscosity and the Mobil 1 oil moves into the proper range very quickly from cold I have continued to use it ever since in my cars. I know when it needs to be changed on my very hot running air cooled engines where the engines use little to no oil until about six or seven thousand miles on the oil change at which time it begins to consume a little oil. This prompts me to do an oil change under the theory that the oil's additive package is starting to not function when oil consumption increases.