Harley Davidson - Formula +

Messages
300
Location
Irvine, CA
Good Evening, I am assuming the Formula + is a gear lube, not a motor oil. It's for the Primary and Transmission. Harley doesn't state the specs, which is really poor if you ask me. Does anyone know what the specs are? Is it a 75w/90 gear oil? Secondly, Baker Transmissions recommends Spectro 75w/140 for the HD transmission, would there be any difference in using Mobil 1, or Valvoline or Amsoil in the same spec? Is there something special about Spectro? Thanks.
 
Messages
737
Location
NC USA
I believe the formula plus is a 40 wt oil, I use rotella 15w40 in the primary and 75w140 motorcraft synthetic gear lube in the trans. I get the motorcraft cheap so that's what I use.
 

LC

Messages
536
Location
Wisconsin
Use any good name brand gear oil in your trans. Formula+ is nothing but a 50 weight oil. Nothing special about it. I have been using Rotella 15w40 in my primary with excellent results. Harley-Davidson Formula + ( Virgin oil analysis* Blackstone Labs) Petroleum based. (Made by Citgo) Ca 169 P 230 B 210 Zn - none No other elemental additives. Viscosity - within SAE 50 range. Listed as a GL-1, does test out as a GL-3. Published specs: Specific Gravity: 0.857 Pounds per Gallon: 7.14 Viscosity, ASTM D 445, cSt at 40°C: 168.04 cSt at 100°C: 20.10 Viscosity Index, ASTM D 2270: 139 Brookfield Viscosity, ASTM D 2983, cP at -26°C - 28,800 cP at -40°C - n/m Pour Point, ASTM D 97, °F (°C): -60 (-51) Flash Point, ASTM D 92, °F (°C): 507 (264)
 
Last edited:
Messages
5,061
Location
South Carolina
Believe it or not this is exactly what I wanted to see, I wish I could find the UOA or VOA from Blackstone. I feel using a straight weight oil in the transmission is best for the bike so if its a 50 weight that is great or 85/90 is fine too. If the Primary + is truly a simple straight weight oil there is no question that is what is best for the transmission as it can never shear down because its a 50 weight oil and cant go lower like a 20/50 or 75w/90 can
 
Last edited:
Messages
57
Location
Ohio
Originally Posted By: alarmguy
Believe it or not this is exactly what I wanted to see, I wish I could find the UOA or VOA from Blackstone. I feel using a straight weight oil in the transmission is best for the bike so if its a 50 weight that is great or 85/90 is fine too. If the Primary + is truly a simple straight weight oil there is no question that is what is best for the transmission as it can never shear down because its a 50 weight oil and cant go lower like a 20/50 or 75w/90 can
I have used Harley formula lately , but have used Bel ray in the past . Harley recommends doing it every 20000, so I don't they are picky on the oil . Some riders say they can feel it shifting easy will Bel ray , but maybe a little more noise . Jake
 
Messages
9,783
Location
Saskatoon canada
I've used many different fluids in my dyna. For the tranny redline shockproof is king. I use Rotella in my primary. Stock clutch and 107hp/115tq. The only time I felt it slip was when I had m1 15w-50 in the primary. Drained it for rotella and 20000 miles later no problems. And no clunk into first either.
 
Messages
57
Location
Ohio
Just done a service on the sportster, put 360 oil in the engine and formula + in the primary . I pull a service at 2500 mi ,but do the trany at 5000 or so Jake
 
Messages
1,058
Location
Indiana (IN)
Originally Posted By: alarmguy
Believe it or not this is exactly what I wanted to see, I wish I could find the UOA or VOA from Blackstone.
The info from the VOA was already posted- Formula+ VOA Red Line makes a 75w-110 gear oil that is about the same viscosity as the Formula+. I used Red Line MT-90 in my Sportster primary/trans, seems good so far (about 2000 miles)
 
Last edited:
Messages
9,783
Location
Saskatoon canada
Originally Posted By: gman2304
Just serviced my primary with Harley Formula+ yesterday. It's what my indy Harley shop recommended.
Of course they recommend it. They sell it don't they. I laugh at these harley guys who buy harley branded fluids thinking it's somehow great when the reality is the product is formulated by the lowest bidder(citgo) and voa shows a barely additized product with minimal anti-wear agents. I guess harley thinks so much of their engines who needs a strong additive package. Rotella is more stout and cheaper. You aren't paying for the harley label,your paying for the oil. I own a harley and I've already been taxed with the higher purchase price and higher cost parts. I refuse to pay extra for oil just because it's branded with a harley logo. Makes me laugh. Reminds me of the title of a dubbie brothers song
 
Messages
4,516
Location
N.C.
They also sell several other brands of oil, but the 2 guys that own the independent shop I use have 50 years of Harley experience between them and I took they're advice. It's a chain case...you could probably p-ss in it and it would be fine. I had them change the primary oil when it was in for a new set of tires...the cost of the Harley primary oil was $6 according to my invoice and it takes just over a qt. I use Valvoline VR1 conventional 'which was $4 a qt on sale at Autozone' in the engine and Redline Shockproof in the transmission. The Redline was $16 for the qt....yes a bit pricey but I'll run it for at least 10,000 miles and maybe more. If you are 'taxed' by the cost of owning a Harley, maybe you should sell it and buy a Hyosung. I've never heard of the dubbie brothers...but I have seen the Doobie brothers in concert a couple of times. Oh....I rode 160 miles today....69 degreesF....eh!
 
Last edited:
Messages
1,046
Location
East Central Missouri
There are several UOA's out here that show the plain-Jane Harley conventional HD360 20W-50 actually turns in good numbers. I think that what most folks have a problem with is that it's more expensive than other oils that turn in as good as, or better numbers. While it's true that the HD Formula+ is basically a manual transmission lube with little additives - take a look at the flashpoint .... it's a good base. ... and you don't need motor oil additives in a transmission/gear case where there is no combustion. Lastly - DO NOT use gear oil or anything rated GL4/5 in a Sportster transmission or a big twin primary chain case. Gear oil can sometimes be unfriendly to yellow metals - and your stator is in there.......
 
Last edited:
Top