Synthetic oils

Very few.

Using syns on a worn engine is costly. It leaks, you spend $$$.

Wet clutch designs need properly designed fluids, or failure results. These are typically on motorcycles. Late models use carbon fiber in the plates, and are better with all synthetics.

Improper cleaning of the parts to rid them of old conventional oil/grease, can result in poor performance from the newer synthetic oils.

You can't mix old (conventional) and new. So you need to make sure you have the correct oil on hand to add if needed. Since you can't depend on everyone to have what you need.

Actually, you can mix them in a bind. But, you would need to get it drained as soon as possible. And you wouldn't want to wait 3000 miles to do it either.

Overall, the benefits far outweigh the drawbacks.

 

[SIZE=-1]Everything you ever wanted to know and more about oil: www.bobistheoilguy.com

Mark
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never been real fond of that website

 

We put the amsoil into an older high mileage truck. 784,171 miles when we put in the synthetic. It did burn quite a bit of oil for a while, but it is fine now. I feel it was worth it. It was a time consuming job to change it over. There was something they had to put in after draining the oil to clean out all of the old regular oil before putting in the new synthetic, as well as installing the bypass system. The truck does run smoother, mileage went up just a little bit, but the time we are saving in not changing oil constantly is well worth the money. As well as having less wear and tear on the motor so that it will last longer.
It is true that you NEED to make sure to have oil on the truck with you because its not available everywhere. Luckily for a while my husband was going by a warehouse where he could phone in an order and pick it up the same day, otherwise we would have found ourselves in a bind a time or 2. Normally we purchase thought a friend who is a distributer, but I did notice that I see it in more places now, like the local freightliner parts house is selling amsoil. I think as time goes by these synthetics will be much easier to find.

 

What do you not like about it?

I find a lot of good information. They have dispelled many of the myths surrounding oil and other products.

Mark

 

Every 15000 miles you take an oil sample..Do you check the viscosity of the oil when you take the sample? Thats alot of mile..Clean oil or not ,if the viscosity level is low your in extreme danger..Just curious...Thnx

 

I find some of his experiments out of context. Also it's just flat out hard to read and not organized well. That and he seems to push that one oil real hard. I forget what it is now though

 

All of the major oil testing companies test everything that would cause issues. They recommend whether or not to replace the oil based on their findings. You can get more detailed reports, too. Just depends on if you want to spend a little more.

15,000 miles really isn't a lot of miles, especially for a quality synthetic. Many maintenance contracts with companies like Ryder or Penske only change the oil every 25,000 miles, and that's with regular oil.

Check out these companies to see what their reports look like:

http://www.blackstone-labs.com/diesel_engines.html

http://www.oaitesting.com/#fleet

These are the two companies that are the most widely used.

 

It's Schaeffer. I thought his experiments were interesting, but like you I was skeptical. I believe he sells Schaeffer, but it is a pretty good quality oil. I have seen several analysis reports on the stuff, and it performs well. The last time I checked, it was also a little cheaper than Amsoil.

I have used Amsoil for a long time now, so that's what I stick with. I used Mobil 1 prior to that, but they don't make a Heavy Duty Diesel synthetic. Any quality full synthetic should be better than regular oil, though.

 

We've used synthetics on an oil sample and test basis. Let the testing co tell u when to change and also will tell you what is wearing, escessive wear, when to OH and its cheap insurance. We have F 250 Diesel and they say never to change the transmission fluid. Our Big Cat, around 100,000 mi on engine oil change with 1 gal Lucas in it and whne we add a quart, about eveery 7000 miles we put in Lucas. Never lost a bearing yet and never been broke down on the road due to anything except tires and fuel gel #-12 in WY because I fueled at Sppedway and had water in the crossover.