Ran across this list earlier today when I was looking for something else. I got to thinking that this is an often asked question. So here it is. Note that it is a couple of years old. Some thing might have changed, but I doubt much has.

H-D WINTER FUEL CONDITIONER (DOWANOL DM GLYCOL ETHER) 99889-91A HJS OF WISCONSIN
HARLEY-DAVIDSON SPORT-TRANS FLUID 99896-88 HJS OF WISCONSIN
HARLEY-DAVIDSON WHEEL BEARING GREASE 99856-92 HJS OF WISCONSIN
HARLEY-DAVIDSON FORK OIL TYPE B 99880-73 HJS OF WISCONSIN

HARLEY BRIGHT METAL POLISH 99725-89 ROLITE CHEMICAL
HARLEY DAVIDSON FUEL ADDITIVE WITH DURALT FUEL CONDITIONER 99893-91A POLAR MOLECULAR
HARLEY BUG REMOVER, BLACK CREME POLISH 99271-96V APPLE POLISHES
HARLEY DAVIDSON LEATHER CARE 98263-95V APPLE POLISHES
HARLEY DAVIDSON LEATHER CLEANER 99274-98V APPLE POLISHES
HARLEY DAVIDSON SUEDE & FABRIC CLEANER 99272-96V APPLE POLISHES
HARLEY DAVIDSON SPRAY POLISH 99817-99 PETRO CHEMICAL PRODUCTS
HARLEY GLAZE 99701-84 CHEMRITE INDUSTRIES
HARLEY GLOSS 94627-98 CHEMRITE INDUSTRIES
HARLEY SUNWASH 94659-98 CHEMRITE INDUSTRIES
HARLEY SWIRL & SCRATCH REMOVER 94655-98 CHEMRITE INDUSTRIES
HARLEY WHEEL & TIRE CLEANER 94658-98 CHEMRITE INDUSTRIES
HARLEY-DAVIDSON WINDSHIELD WATER REPELLENT 99841-01 CHEMRITE INDUSTRIES
HARLEY-DAVIDSON LEATHER DRESSING 98261-91V PECARD CHEMICAL
HARLEY-DAVIDSON POLY OIL 99860-81 GENERAL POLYMERIC
HARLEY-DAVIDSON CHAINCASE OIL 99887-84 CITGO PETROLEUM
HARLEY-DAVIDSON HD MOTOR OIL, SAE 10W-40 99816-1040 CITGO PETROLEUM
HARLEY-DAVIDSON HD MOTOR OIL, SAE 20W-50 99816-2050 CITGO PETROLEUM
HARLEY-DAVIDSON HD MOTOR OIL, SAE 50 99816-50 CITGO PETROLEUM
HARLEY-DAVIDSON HD MOTOR OIL, SAE 60 99816-60 CITGO PETROLEUM
HARLEY-DAVIDSON HYDRAULIC FORK OIL TYPE E 99884-80 CITGO PETROLEUM
HARLEY-DAVIDSON SCREAMIN' EAGLE FORK OIL (HEAVY) 99881-87 CITGO PETROLEUM
HARLEY-DAVIDSON SCREAMIN' EAGLE RACING FORK OIL (EXTRA HEAVY) 99909-93R CITGO PETROLEUM
HARLEY-DAVIDSON SEMI-SYNTHETIC TRANSMISSION LUBRICANT 99892-84 CITGO PETROLEUM
HARLEY-DAVIDSON SYNTHETIC SCREAMIN' EAGLE MOTOR OIL, SAE 20W-50 99824-03 CITGO PETROLEUM

HEAVY DUTY CHAIN LUBE - PJ1

DOT 5 BRAKE FLUID 99902-77 DOW-CORNING

 

And all that means to me is Harley isn't in the petroleum business. No kidding.

 

So to me that means that you go buy citgo oil a lot cheaper than hardley's oil and it could not possibly be twisted into a warranty issue if it were ever to arise!

 

It can't be anyway. I'm running Mobil 1 in all 3 holes in my still under warranty bike.

 

faulty logic. just because citgo makes it, doesn't mean that you can buy it off the shelf elsewhere.

but like said, use a good oil of the proper grade/viscosity and you won't have any problems, bike or warranty. at least not oil related.