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AMSOIL carries higher viscosity oils, and I can provide info on them such as the Severe Gear 75W90 and 75W110.

ofblong wrote:

slimcolo wrote:Would like to try syn oil in FLH but all I find is really light weight, like car oil. I cannot seem to find anyone making a good syn replacement oil for HD super heavy.

You mean the synthetic oil designed specifically for Diesel engines isn't gonna work? Walmart sells it.

You have to remember the Harley mentality, heavier is better
What kills Harley crankshafts isn't too light an oil but over revving, thats why they shouldn't go over 4,800 rpm (big twins, Evo's, TC, etc) Sportsters survive higher rpm with shorter stroke and lighter rods

PJ

HD manual recommends;
Harley Davidson 58 (light) below 32 F.
Harley Davidson 75 (medium heavy) 32-75F
harley Davidson 105 (regular heavy) above 75F

Consumption (normal) 250-500 miles per quart.

Change interval is 2000 miles.

slimcolo wrote:HD manual recommends;
Harley Davidson 58 (light) below 32 F.
Harley Davidson 75 (medium heavy) 32-75F
harley Davidson 105 (regular heavy) above 75F

Consumption (normal) 250-500 miles per quart.

Change interval is 2000 miles.

If its like anything else they do, they made up some numbers for regular oil
(who else would call intake manifold boot a 'compliance fitting')
PJ

slimcolo wrote:HD manual recommends;
Harley Davidson 58 (light) below 32 F.
Harley Davidson 75 (medium heavy) 32-75F
harley Davidson 105 (regular heavy) above 75F

Consumption (normal) 250-500 miles per quart.

Change interval is 2000 miles.

sounds like hd oil weights which means 75 is probably something more like 20w-40 or 20w-50.

slimcolo wrote:HD manual recommends;
Harley Davidson 58 (light) below 32 F.
Harley Davidson 75 (medium heavy) 32-75F
harley Davidson 105 (regular heavy) above 75F

Consumption (normal) 250-500 miles per quart.

Change interval is 2000 miles.

SAE 20W50 is used in all Evo Harleys� giving the benefits of both a cold situation 20-wt. oil and an operating temperature 50 wt. Pre-Evos use SAE40 for cold weather, SAE50 for warm weather and SAE60 for hotter conditions. In early manuals when Harley� was even more intent in confusing everyone, the Factory’s designations were grade 58, (SAE 40); 75, (SAE 50) and 105, (SAE 60). Later manuals exacerbated this situation by designating their packaged product supplied by major refineries as special light, (SAE 40), heavy, (SAE 50) and extra heavy which of course is the 60 wt.

From http://www.heavydutycycles.com/sjoila.htm

lol I guess I did a pretty good guess then huh lol. Mark this cause itll probably never happen again.

slimcolo wrote:Consumption (normal) 250-500 miles per quart.

Haha, you're pulling our chain.

Skier that is a direct quote from the Harley manual. According to Noel.

Never had one that burnt oil that bad though, even needing rebuilt! (except my old 74 that has a constant loss oil system)

mydlyfkryzis wrote:

crazy5dave wrote:wow what kind of dry sump tank has room for extra ten liters? harleys are about maybe a half a liter extra max. thats why they blow out the dipstick, or blow apart the new plastic sportster tanks.

I don't think you could put 10 liters extra in a car engine.

My wife worked with a girl about 15 years ago. Michelle not that it matters. (just asked her if she remembered that girl, she remembered her name).
She comes out of work one day and the oil light stays on on her car.
She turns it off, goes back into work and calls her boyfriend: "what do I do?"
"Go to the parts store, buy a case of oil and fill it up, otherwise you'll end up seizing the engine."
DUH! women.
Just happens to be a parts store across the street, so she walks over, buys a case of oil, carries it back to the car.
She opens the hood and looks around and oh that knob says OIL on it.
She unscrews the knob and looks in and sure enough...no oil.
When that case is empty she goes and gets another case. (I think I might have questioned the return trip, but the after school job kid didn't)
Somewhere into the second case of oil the level finally comes up...hmmm...I wonder how full it should be?
Probably up to the bottom of hole here and the 350 Chevy is "filled".
Now she puts the rest of the oil in the trunk and tries to start the car.
The starter is trying...she can hear it...but it won't turn over.
OH NO. Back into work to phone the BF and tell him through sobs and tears that the motor is froze. It must have been running without oil for too long.

True story. I swear it.