Amsoil 20W50 Crankcase & Primary .. Severe Gear 75W140 Tranny ..

Although used 20W50 for everything on my last 3 Sportsters in the past 10 years, over 100,000 Miles with Great results ..

I don't have any interest in the Company just had good results ...

 

Thanks for the replies. I don't know which oil (syn vs. dino) gets dirtier quicker but with semi-syn, I get the dirt no matter what. Thought about getting analyzed but what the heck, the bikes running great, not leaking and the insides looked flawless when I had the cam installed. The spark plug links were great. At least I know my jetting is darn close. You can always count on the Evo section to come up with helpful answers

 

Remember that old oil comerical where they took a pan of brand X oil on a stove and brand Y and brand X heated up and turned brown to black?
The dino oil will collect carbon from the engine, as well as other stuff. The detergent is working.
I swapped from dino to Amsoil and had to dump it a few times to get all the "yuk" out. It's designed to "clean" an engine.
Now the Amsoil oil seems to be holding a light tan.
Joe
The world is in balance...........
my '74 seeps fluid
My harley seeps fluid
and as I sail pass the 1/2 century mark of life, I'm starting to seep fluids!

 

My 98 Dyna has 75,000 miles on it. Oil changed religiously every 2000 miles. Up to about 1500 miles, it stays pretty golden looking, but the last 500 miles, it really darkens up. I just change it, and keep riding.

 

I don't either, and I will do it differently in the future. I am going to pump, or suck the oil out of the tank, and hopefully, I will find a crankcase drain. I have never seen oil get so black, so quick in my life. I have owned a lot of cars, and airplanes, and have usually done my own maint on all of them, and I have never seen anything like this. The bike had 7300 miles on it when I bought it, and I now suspect it may have not had an oil change, although if it left a quart of the old, dirty, oil in it at the last oil change, it might explain why the old oil was so black.

 

40 wt Dino oil in oil bag .

 

What do you think makes the oil dark?

It is because the oil is doing what it is supposed to do, picking up the contaminants and suspending them in the oil.

If the oil stays clean, it is not doing it`s job.

Stop worrying about the color of the oil, it is meaningless.

If you want to know what is in the oil, send a sample to a lab.

 

Only 10 years

 

OH BOY! A Zombie Thread!!

Stokes was mistaken about that. He didn't understand the dry sump oiling system of a Harley. You drain the oil tank and there might be a few ounces at most left laying around. Not to worry about.

 

The majority of the bikes I've owned over the last 50 years have been 'dry sump', with a remote oil tank. The amount of oil left behind in the engine after draining the oil tank is not enough to worry about. Recent vehicles are made to superior standards and materials, also current oils have improved too, since I started out. There is no need to make any more of this! Drain the tank, replace the filter, refill and ride on.