Talked to a service rep couple days ago. He claims that a number of service shops are reporting problems with synthetics. Says they believe they're too slick resulting in bearing wearout, leaks, etc. Anyone else hear anything similar?

 

And, oh, by the way, please don't shoot the messenger. [\\]

 

BULLSHOES

 

Hope you're right, was planning on switching to it at 1000 miles. According to him, he and a bunch of others attended a HD service session in Nashville (I believe) and when the HD Rep asked how many were pushing syn oil to customers, none replied in the affirmative. When he asked why, was told by many of issues they, the service personnel, are seeing.

 

Are they serious?&nbsp\\; Just add a couple ounces of&nbsp\\;sugar at each oil change (kidding)..&nbsp\\;
&nbsp\\;

 

Here is what AMSOIL has to say about that:

The Fear of Synthetic Lubricants Eating Your Seals

I have heard that AMSOIL synthetic lubricants will eat your seals. Is there a seal compatibility
issue?

Let’s call this an “old mechanics” tale. This fear has been around since AMSOIL pioneered the synthetics
lubricants industry back in the 1970’s. AMSOIL synthetic oils will not damage your seals and will not
cause an engine oil leak. AMSOIL synthetic motor oils have an inherent detergency and natural solvency,
which can clean and remove deposits left by conventional oils. The removal of extensive oil deposits can
expose marginal or damaged oil seals that may then leak. However, motor oils are designed to help swell
seals slightly to prevent leakage. As long as a vehicle has been well maintained, and in good mechanical
condition, AMSOIL Synthetic Motor Oils can be used in any vehicle without fear.

Bear

 

If in fact there is a bearing issue, it would be from misaligned bores and shitty crankshafts with major runout, not the oil
Ron

 

Agree with the Amsoil position.I have used a lot of good oils and for the last 4 years I have used Amsoil without any problems.I thought that old BS LINE ABOUT SYNTHETICS WAS GONE BUT BS DIES A SLOW DEATH.All Screaming Eagle bikes come from HD with Syn 3 hd synthetic.I also maintain good oil pressure on my Ultra and I do not take off the lowers.Use almost anything else and your oil pressure guage at idle when hot will read at zero.But what the heck.There are still some people who dont believe we landed on the moon.

 

Someone is feeding a true line of cow droppings. How could any oil be too slick? The whole point of oil is to provide a very thin layer of protection between metal surfaces. I use Lucus synthetic oil in all of my bikes, race cars and hot rods. Never had an oil problem with any synthetics.

 

Here is what the experts have to say:

Synthetics and Slipperiness.cwk