I use Amsoil 0w20 entire year with amsoil filter. I see major differences as I live in Canada with the winter temperature dropping like crazy. I left my car outside never had problem starting and running. Both my Civic and Camry. Civic with 330k km.

Here is the article that you guys might want to check it out. Pretty interesting.

The Pour Point Test determines the lowest temperature at which a lubricant flows.The lower a lubricant’s pour point,the better protection it provides in low-temperature service.As shown in the graph, AMSOIL 5W-30 Synthetic Motor Oil has a lower pour point than Mobil 1 SuperSyn 5W-30 Motor Oil.

Mobil 1 has run the tag line for their advertising stating "nothing outperforms Mobil 1". Mobil makes a good oil, but I'm here to tell you that it does not outperform Amsoil Synthetic Oils. They can come out with all the catchy advertising buzz words to market their oils, but in the final analysis, buzz words don't add one thing to their product's performance. The only reason Amsoil has continued to grow and prosper competing with large corporations like Mobil is that AMSOIL products have consistently performed better.

Here's a special excerpt from A.J. Amaturio, President of AMSOIL, as written in the monthly AMSOIL Action News magazine to all AMSOIL Dealers regarding AMSOIL and Mobil 1:

"As most of you are aware. Mobil 1 was introduced after AMSOIL had paved the way for synthetic motor oils back in the '70's. When it was introduced it cased great concern among many of our Dealers. But in my Presidents Message at the time, I assured everyone that having Mobil 1 on the market would only help us sell more oil. Mobil confirmed everything we had been saying about synthetic oils, and our products and claims instantly became more credible.

Since then, we have always been compared to Mobil 1. When people think of synthetic motor oil, they think of Amsoil and Mobil 1, not the other Johnny-come-lately's that have come on the market more recently. I have always said that Mobil 1 is a good motor oil, because compared to the run-of-the-mill motor oils on the market, it is. I have also always said that AMSOIL motor oil is better, again, because it is. Mobil makes their oils to run at normal drain intervals while we make ours for extended drain intervals, and therein lies the difference. Their oils don't have to be as good as ours, so they are not.

To prove that point, we ran a number of comparative tests on our 5W-30 and Mobil 1 SuperSyn 5W-30. The test results are published in this Action News, and they confirm what I have been saying all along. AMSOIL makes a better motor oil.

These test results show significant differences between the oils. Look at the results of the NOACK Volatility Test. Which synthetic oil is going to last longer in service? Look at the difference in Total Base Numbers. Again, which oil is going to provide the longest lasting protection? Look at the Four Ball Wear Test. Which oil will protect against engine wear better? In every category we tested, Amsoil proved superior. Lower pour point, higher flash and fire points, AMSOIL tested best.

http://www.synthetic-oil-tech.com/d...._vs_mobil1.htm

 

Was that the result of an independent test, or a promotion from the web site?

 

I don't know if it is independent test or if it is promotional gimmick but it is good to know. Does anyone here is a lubricant specialist or could do some test with the amsoil oil vs the others?

Maybe we can complain to better business bureau or even sue the company for false advertisement. Cos that is what they want. Read below and the link

Hypothetically let's say Amsoil didn't deliver as promised. Let's also assume for one minute that it's a lie, crazy, false and deceptive advertising. Don't you think for a minute that Mobil, Royal Purple, Redline, Castrol, Shell Oil or Exxon wouldn't be all over Amsoil in a court of law suing for FALSE ADVERTISING?

http://www.worldsbestoil.ca/federal-...l-problems.php

 

Having used this oil for the last 20 years in the cold country in many aircraft and now the Gulfstream V, and 5 frontend loaders that must be started and run in the very cold for snow removal, We put it in the hydraulic system also and find no matter how cold it is out the loader is very smooth and without lagtime due to stiff oil as the pour point is at leat -50 below. The standard oil that came in them new got so stiff when cold the loaders would not even go up or down cold. I buy this oil by the 55 gallon drums and put the same grade in the engines of at least 30 units. my Camry gets the same oil everything else does. am I worried about a puky little 4 cylinder engine? $%ll no as I have this oil in $100K engines. some say oh it will not get to the top end soon enough, this is all bullcrap and old wives tails. using dino oil I would sure use very thin oil. but full synthetic no worries. so stop worrying and drive the SOB!!!!

 

The Toyota service department can order in the Toyota brand 0W-20 synthetic oil for you. It comes in 1-quart bottles. I ordered a case of these when I was visiting Indiana a year ago, and brought them back to Canada. The cost was less than US$5.00 per quart. So this is what I suggest you do.

Look at the top of page PP-15 (attached) from the TCH Repair Manual. They say (quote); "SAE 5W-20 and SAE 0W-20 engine oil may be used. However, SAE 0W-20 is the best choice for good fuel economy and good starting in cold weather." I'm using 0W-20 year round.

Stan

 

I don't have the luxury of going to US to pick up toyota brand 0w-20. I doubt it even that it will outperform mobil 1 synthetic oil let along Amsoil. I live in Canada too so I know how cold it gets. Do you experience start up problem when it gets -30?

 

Not All Synthetics Are Created Equal:
Please be aware that not all synthetics are created equal. There is wide differences in quality and protection provided by the various synthetics. Additionally, not all synthetics are 100% synthetic. Many are partial synthetics marketed under the perception of full synthetics to the unsuspecting consumer or even Group III hydrocracked oils such as Castrol Syntec, for example, which is a hydroisomerized petroleum oil marketed under the disguise of a synthetic (there is a full article on this in our Informative Articles section detailing the recent battle between Castrol and Mobil). There are no PAO (polyalphaolefin) synthetic molecules in Castrol Syntec, yet because of legal finagling with the definition of synthesized motor oils they can legally be called synthetic. Basically, they changed the definition of a synthetic to fit the process of highly refining a petroleum base oil, called hydrocracking and fought with Mobil and the National Advertising Council to loosen the definition of a synthetic.
Film strength is important in another way- cold start protection. Regular mineral-based oil will not remain as a boundary layer (a uniform thin coating) on metal surfaces when an engine is turned off. Mineral-based oil drains off parts and out of passageways into the oil pan. Additionally, mineral-based oils contain waxes and paraffins that come out of the earth and solidify when it gets colder outside, therefore making it even harder to pump the oil when cold. When you crank your vehicle the metal surfaces (crankshaft, camshaft, lifters, connecting rod bearings, piston pin bushings & bearings, piston, rings and cylinder walls) that require lubrication are not fully lubricated in the time it takes for the oil pump to pressurize the lubrication system and supply oil to the engine.

http://www.synthetic-oil-tech.com/d....ept_secret.htm

 

I don't know what kind of oil you use but I use Amsoil. PS on the aircraft and the heavy equip I always do oil analacist (spelling)You would be suprised how long and how many miles before this particular oil breaks down lol!!

 

Is it necessary to change oil every 5K miles even when 0W-20 Synthetic oil is used?

 

I don't know what kind of aircraft you have but i only use it on my car. Since you have at least 10 cars and with aircraft and heavy equipment, i think you probably into smuggling vechicle. Making profit?