Ok guys, what do you think the best engine oil is, and tell why you think it's better or the best!
I use Mobil 1 and have used royal purple, I really don't know which one would be the best, but I know that Mobil 1 is suggested to be used in our crossfires. Also used in a lot of race applications and used in Mercedes, BMW and so on. I don't know how many application that Royal Purple is used in. For that reason Mobil 1 is the oil I use in all my vehicles!

 

keep using it.... If something works, why change it? Only thing I use in my toys, except for the big rig....it gets Shell Rotella... Diesel use.... If Mobil 1 was good for that< I would use it...lol

 

I don't think I will be using anything but Mobil 1! I use to work on big rigs and always use rotella T which is a detergent oil and it should keep your rig nice and clean inside the engine and a whole lot more miles to go! Good oil for your rig!

 

My first car was a 1974 Dodge Colt GT (Mitsubishi Lancer) that I put just a tick under 200,000 miles on before giving it to my young brother-in-law. I used Castrol GTX 20W50 in that thing all year long in Michigan, along with Fram filters. That thing was humming beautifully when I got rid of it and it still didn't burn any oil.

I also put just shy of 200,000 miles on a 1984 BMW 318i that got a mix of Pennzoil and Castrol 10W40 oil and Fram filters. Again, no oil burning and it ran like a top.

It should be noted that every forum I've ever been to will have someone who says Fram oil filters are pure junk, so I always wonder what would have happened in those two cars if I'd used something else?????????

For a brief period in 2008 I had a 1987 Chrysler 5th Avenue that I picked up from the original owner. It had 247,000 miles on the 318 V8 engine, ran like a top, and she said it had always been serviced at Jiffy Lube for oil changes.

All that said, since the Crossfire came from the factory filled with Mobil 1, and so many other high end cars do as well, I've got no problems sticking with it. My PT Cruiser Turbo uses the engine oil to cool the turbo, and since turbos create so much heat I switched to Mobil 1 when the car had 500 miles on it. It has 71,000 now. I change the oil every 3000 miles in that car, which some claim is overkill but I figure it's cheap insurance considering how hot that turbo gets (and I tend to drive that car really hard). The Crossfire gets an oil change once a year, right around the anniversary of my purchase date. That's coming up in a week or so, so it's due for it's annual change even though it only has 19,500 miles on the clock. It's a 2005 MY car that I bought brand spanking new in 2007, so it's averaging just a touch under 4,000 miles/year.

My wife's Chevy Cobalt, on the other hand, gets either Pennzoil or Quaker State, whichever I can get the better deal on. She doesn't drive it much, or push it at all, so I figure based on my experiences with the Colt, 318i and 5th Avenue it ought to be fine.

 

I get AMSOIL for about the same price as Mobil 1 and my car loves it no matter how hard I beat on her.

 

Sign up now for a free 8 quart "Welcome to the Club" sample for your next oil change? Go ahead and put me on the list..

 

Has Amsoil been race proven like mobil1? Mobil 1 is used in many foreign and domestic cars straight from the factory, not trying to bash Amsoil, just looking for proof of the claims of Amsoil. Everyone has there personal preference.
I thought this interesting
Synthetic Oil | Mobil 1 is Factory Fill in 40 Car Models

 

AMSOIL was race proven before Mobil 1 since they were the first in synthetics and have been around longer.

http://www.modernoils.com/media/pdf_...plications.pdf

 

The first synthetic motor oil was made by I.G Farben in Germany in 1938. The technology was captured as war booty by the U.S. and used commercially. Amsoil was not the first. IMHO Mobil 1 is the best. gary

 

Years back I was able to take a few classes for an insurance license I was after. I was lucky enough to be setting in class with an engineer working for Mobil Oil. Mobil 1 had not been released to the market yet. Being young, and into Corvettes, and this engineer also driving a vette, well, we became friends right off. After a few weeks oil became a topic of discussion, and he was testing Mobil 1 in his new vette. He told me he was changing oil every 10K miles. I was astonished because in those times, it was 3K... So, in those few weeks I was introduced to synthetics and started having my oil analysed by a lab he suggested, and I was allowed to participate on those early years. WE ran our big trucks for 10k oil intervals, so I knew it was possible. Long story short, I was spending the big bucks for Mobil 1 after it's release, but was changing my oil every 7k, and have continued this 35 yrs later plus or minus...lol That doesn't mean other synthetics aren't good, just what I like to run having this history. I hear good things about Amsoil, and did try some in the Harley. I didn't see any difference other than price... What I wouldn't recommend having seen a lot of engines torn down, is pennzoil, Kendall, quaker state. You had better be changing those every 3k, because if you don't you see a lot of build up on the valve covers. They don't like heat, where synthetics do a better job. Just my opinion.

 

That is good advertising from Amsoil, but I don't see any outside sources stating they use Amsoil on there page, they do have pictures of cars that use Mobil 1
Amsoil vs Mobil1 will never rest. I found this quote from another forum
Quote:
Mobil 1 Pioneers the Performance of GM’s Racing Teams
HomePerformance

From the original Corvette LT1 to the 505 HP Corvette Z06
and now ECOTEC Supercharged LSJ and Turbocharged LNF engines

The General Motors (GM) Chevrolet Corvette race program can trace it origins back 50 years to the original V-8 engines that powered the company’s range of road cars. GM’s desire to demonstrate its engineering ability at the highest level led, in 1996, to the formation of the Mobil 1 supported Corvette Racing program.

“When I was challenged by Herb Fishel to establish the Corvette Racing team, the decision over which motor oil we would run was one I didn’t need to linger over,” said Doug Fehan, GM Program Manager, Corvette Racing. “Mobil 1 has an unrivalled record with engine designers and tuners. The decision was a simple one.”

As Mike Atkins, Purchasing/Customer Service Manager for Pratt & Miller, explains, “Mobil 1 has always been highly regarded throughout GM by the GTO, Cadillac and GTS V8 race program teams. We needed a lubricant to initially maximize power and reliability of the Corvette’s road-orientated engine but also provide a stable platform from which to help develop its potential.” Mobil 1 5W-30 is also currently used by the ECOTEC Powered Pontiac Solstice GXP Drift Team and Cobalt SS Sports Compact Drag Racing teams.

During this decade of development, the team has continued using Mobil 1 lubricants on the strength of the tests undertaken. “Why Mobil 1 after 10 years? “asks Doug Fehan. “Well, nobody’s developed anything better.”

Maximizing performance parameters

The reasons why GM technicians choose to work with Mobil 1 products is better understood by reviewing testing and race conditions. Mobil 1 products have long held a reputation for performing in extreme conditions, a reputation built through participation in many of the world’s most arduous racing series, including Formula 1, NASCAR, drag racing, and now Formula D Drifting and Sports Compact Drag Racing. Any race team looking for an instant-win solution to their lubrication needs is reassured by having access to technology developed under a wide variety of driving conditions.

What distinguishes Mobil 1 from other products is the unique combination of base stocks and additives. Mobil 1 contains high-performance synthetic fluids, with superior low and high temperature performance properties (as a result of their higher viscosity index). Additionally Mobil 1's component blended formulation contains additives designed to maximize engine performance.

ExxonMobil was first approached in early 1990s when GM was seeking a high-temperature performing lubricant. In response, ExxonMobil created a high-temperature performance specification based around the performance capabilities of Mobil 1. Since then this specification of Mobil 1 has been used as factory fill for Corvettes, Cadillacs, Saturn Red Line, Cobalt SS, Pontiac Solstice GXP, and a number of other high-temperature performance engines for GM. Although similar in some respects to the road car’s requirements, the GM Racing team’s needs are based upon three performance parameters: outright power, improved engine reliability and component durability. The teams are only interested in a lubricant offering the best combination of all three.

“Our engines must be fast,” Fehan explains. “But there’s no point adding 3bhp and risking 24-hour reliability. Continuous testing has shown Mobil 1 offers the best combination of power, reliability and durability. ”

As these high-performance track experiences can attest, Mobil 1 has proven its ability to withstand extremely high temperatures, and continue to offer the same level of engine protection and performance.

 

I've never stated that Mobil 1 wasn't a good oil but is indeed a great oil. I just know that Mobil 1 is not a better oil and I would use both in my cars. I've been using AMSOIL for about 30 years and swear by it, including all the drag racing I've done in those 30 years. AMSOIL has also proven to be one of the best out there also. I would say in the long run, there is less wear and tear in the motor using only AMSOIL. Our cars came with Mobil 1, and you can't go wrong with either oil. My self living down in the hot conditions in Florida with a supercharged motor would rather use a 5W-40 over a 0w-40 anyday. That's me and I feel really safe sticking with it. Also, I could not find any info saying mobil 1 was better that AMSOIL, but rather the other way around. Here's an interesting article...

http://www.alternative-energy-resour...t/mobil-1.html

 

I am sure Amsoil is a great oil, but they are not the first synthetic oil.

Synthetic oil - Wikipedia, the free encyclopedia

 

I will use either 5w-40 or 0w-40, as it doesn't matter to me. I think everyone has their favorite oil, and the big thing is, is changing it....whether you are 3k or a 7k like me, you must change it. I am NOT a fan is devices for sucking it out and never will be. I still do it the old way, and I like it draining for awhile. I am never in a hurry to refill it until I see nothing coming out. You never get it all, but you will get more the old way. I see guys making statements it only takes 8 qts... yes it does if you don't get the half qt out. Put 8 qts of clean oil in a bucket then pour a half qt of used oil in there and see what you have. My cars take 8 1/2 qts everytime. Never a high oil level. I don't think I have a different motor...lol... Each to their own, and that is the way it is with oil.... I had 4 motors in the Camaro big block, each time they were torn down, they were spotless with Mobil 1. I had friends running motors with the other brands, and their motors weren't as clean. journals cruded up, valves covers coated, and crap in the pan... not with the synthetic...

 

Let me refrase that....

AMSOIL is the first synthetic motor oil in the United States to meet American Petroleum Institute (API) requirements.