Fatboy fluids question
Seasoned HDF Member
Joined: Aug 2010
Posts: 5,173
Likes: 177
From: East Coast
I wouldn't put castrol in my hd
Amsoil oil study II
If u don't wanna read the entire study, look at the last comparison chart on pg 24.
Amsoil is pricey, so I run Mobil 1 syn.
Amsoil oil study II
If u don't wanna read the entire study, look at the last comparison chart on pg 24.
Amsoil is pricey, so I run Mobil 1 syn.
Amsoil goes in my scoot. I save the Mobil 1 for my lawn mower and air compressor.
Thread Starter
|
Advanced
Joined: Jun 2009
Posts: 64
Likes: 0
OK so point taken, now that I am back working, next oil change gets better oil.
Hey OWOF, how long have you been with the Daytona BFs? I hear your house is open to the public on weekends, One of these days I will make a weekend trip over. Would love to talk to you about the MC if it's not against the by-laws
Hey OWOF, how long have you been with the Daytona BFs? I hear your house is open to the public on weekends, One of these days I will make a weekend trip over. Would love to talk to you about the MC if it's not against the by-laws
Thread Starter
|
Advanced
Joined: Jun 2009
Posts: 64
Likes: 0
I guess I'll do the red tranny and UV dye thing to determine what it is I am seeing.
I also remember that last couple of times I have used engine degreaser on the bike, underneath the motor...I dont see how that could affect it though.
I also remember that last couple of times I have used engine degreaser on the bike, underneath the motor...I dont see how that could affect it though.
Tourer
Joined: May 2011
Posts: 324
Likes: 8
From: Florida
OK so point taken, now that I am back working, next oil change gets better oil.
Hey OWOF, how long have you been with the Daytona BFs? I hear your house is open to the public on weekends, One of these days I will make a weekend trip over. Would love to talk to you about the MC if it's not against the by-laws
Hey OWOF, how long have you been with the Daytona BFs? I hear your house is open to the public on weekends, One of these days I will make a weekend trip over. Would love to talk to you about the MC if it's not against the by-laws
Seasoned HDF Member
Joined: Mar 2009
Posts: 24,684
Likes: 9,167
From: Snow Hill, NC
Castrol is fine...as long as you change it....Drink the Kool aid if you want...Not saying Amsoil ain't good...i have used it but if you change your oil regularly any 20w50 or 15w50 either Auto or V-twin oil is fine....remember it doesn't share the primary or tranny like metrics do so any Motor oil in that weight will be fine...Primary and tranny??? I now just use HD formula Plus... tried all the others and at 68000 miles in 4 years the bike works, shifts behaves whatever... about the same... Again...just MAKE SURE you change it....
I now use 15w50 full syn from NAPA...3.99 a quart sometimes...i change it between 4000-5000 miles...
I now use 15w50 full syn from NAPA...3.99 a quart sometimes...i change it between 4000-5000 miles...
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Thread Starter
|
Advanced
Joined: Jun 2009
Posts: 64
Likes: 0
ok. so if I put shocvkproof in my tranny, can I put royal purple in my primary without it causing any problems...I know with stock HD lube the Primary / tranny fluids are interchangable?
Notgrownup, I change my engine oil every 3000 miles and I do primary and tranny every other oil change.
Notgrownup, I change my engine oil every 3000 miles and I do primary and tranny every other oil change.
Tourer
Joined: May 2011
Posts: 324
Likes: 8
From: Florida
Viscosity Index: Castrol ranked 2nd to last out of 17 brands
Viscosity Shear Stability: Castrol ranked 3rd to last out of 17 brands
Rust Protection: Castrol ranked last out of 17 brands
High Temperature / High Shear Viscosity: Castrol ranked 4th to last out of 17 brands
Wear Protection: Castrol ranked 6th to last out of 17 brands
Oxidation Stability: Castrol ranked 6th to last out of 17 brands
Foam Control: Castrol ranked 6th to last out of 17 brands
I understand oils have to meet SAE requirements etc, but their V-twin oil is poor by comparison. Realizing the temps HD's run I' would advise against it. I'm not an expert. Castrol braggs about thermal breakdown protection and failed miserably on the viscosity test. And It didn't do well on the wear test. I ride the hell out of my bikes, and frequently change the oil. But if an oil is going to fail under certain conditions, it doesn't frequent changes may not prevent damage.
I know a lot of people swear by RP. I tried it in my Supercharged car and within a week noticed purple drips under it which became progressively worse every few days. I removed it under advice of the guy that built the superchargers and worked for GM, and after removal, it sealed back up and no more leaks. Just my experience.
Viscosity Shear Stability: Castrol ranked 3rd to last out of 17 brands
Rust Protection: Castrol ranked last out of 17 brands
High Temperature / High Shear Viscosity: Castrol ranked 4th to last out of 17 brands
Wear Protection: Castrol ranked 6th to last out of 17 brands
Oxidation Stability: Castrol ranked 6th to last out of 17 brands
Foam Control: Castrol ranked 6th to last out of 17 brands
I understand oils have to meet SAE requirements etc, but their V-twin oil is poor by comparison. Realizing the temps HD's run I' would advise against it. I'm not an expert. Castrol braggs about thermal breakdown protection and failed miserably on the viscosity test. And It didn't do well on the wear test. I ride the hell out of my bikes, and frequently change the oil. But if an oil is going to fail under certain conditions, it doesn't frequent changes may not prevent damage.
I know a lot of people swear by RP. I tried it in my Supercharged car and within a week noticed purple drips under it which became progressively worse every few days. I removed it under advice of the guy that built the superchargers and worked for GM, and after removal, it sealed back up and no more leaks. Just my experience.
Last edited by outgood; Feb 13, 2012 at 09:41 AM.