Can I Use 10w40 In My Harley?

Can I use gear oil in my Harley transmission?

Our answer: It is perfectly acceptable to use 75W-140 gear oil in Harley-Davidson transmissions.

For instance, AMSOIL V-Twin Synthetic Transmission Oil is an SAE 110 gear oil.

Let’s discuss the pros and cons of going with 75W-140..

Should I run synthetic oil in my Harley?

Synthetic oil is preferable to mineral oil primarily because it has a higher heat tolerance. That is very important in air-cooled engines like the one in your Harley. Not all synthetic oils are the same.

Do motorcycles need special oil?

Motorcycles, on the other hand, use the same oil for both the engine and the gearbox. … Compared to car engines, a motorcycle engine oil requires balanced friction characteristics as it needs to lubricate the wet clutch, which in turn transfers engine power to the drivetrain.

When should I use 10w40 oil?

When to Use 10w30 vs 10w40 Using 10w30 oil in cold weather will help reduce excessive oil temperatures and drag as the engine warms up. Using 10w40 oil in the summer will help the oil stick to internal components in high temperatures, avoiding the wear and tear from metal-to-metal contact between moving parts.

How do you add oil to a Harley Davidson primary?

Unscrew the derby cover bolts, using a Torx driver, and pull the cover away from the outer primary cover. Fill the primary with up to one quart of Harley-Davidson primary fluid, stopping when the fluid is level with the bottom of the clutch assembly held within the primary cover.

Can you use ATF in Harley primary?

The viscosity in ATF generally is too low to recommend for using in the primary case. After reading a number of threads about ATF in the primary, I gave it a shot. I have run Harley’s primary / transmission fluid in the primary since I bought the bike, and to be honest, the bike has run just fine.

Is it bad to mix 10w40 with 20w50?

If you mix it together I think you get 15W45 8) It won’t hurt anything mixing oil weights, just don’t mix Dino & Synthetic.

How much oil goes in a Harley primary?

Fill the primary with oil Harley Davidson Softails require one quart of primary fluid. Be sure to check your owner’s manual or the AMSOIL Product Guide for the correct primary oil capacity for your bike.

Can I use regular 10w40 in my motorcycle?

You “can” but for most motorcycles you shouldn’t. If the engine and the transmission share the same oil, the gears in the transmission wear out normal car oil very quickly. And if the clutch is wet, a high end car oil will not have the friction modifiers required to keep the clutch from slipping.

What happens if I use 10w40 instead of 10w30?

A 10W30 engine oil will still be able to protect your engine, but it will thin out very fast that it may no longer be able to prevent the metallic moving parts from scraping against each other. As such, you will have a much better chance of protecting your engine if you use a 10W40 in hot weather conditions.

What oil should I use in my Harley transmission?

To get the best performance, you should have synthetic oil for your gear, synthetic oil for the clutch, chain and synthetic oil for your engine. Synthetic oil for your gear protects your gear and bearing against wear and tear and also aids in the smooth shifting of the gears.

Do Harleys break down a lot?

Harleys break down for several reasons. … There is also the failure of Harley owners to maintain their bikes properly. Many owners consider maintenance too costly, and so skip regular servicing. The bikes will break down eventually, after a long period without maintenance.

Is 50000 miles alot for a motorcycle?

A motorcycle engine with 40,000 to 50,000 miles is considered a high-mileage bike in some circles. But if this particular motorcycle has complete maintenance records, has no evidence of physical damage, and the engine has no oil leaks, then this is considered a good buy.

Can I use 10w40 instead of 10w30 in my motorcycle?

10w40 would be thicker than 10w30. 40 viscosity will work just fine in the bike. It is the more popular than the 30 in terms of availability and practicality. 40 grade oil has the potential of working in anything from cars, motorcycles, to tractors and semi-trucks, depending on how its formulated.

Can I use car oil in my Harley?

Although you can temporarily use motor oil, it may end up damaging your bike. If you want an oil to use in all weather conditions they recommend that you should use SAE 20W50. For low temperatures, Harley recommends SAE 10W40, which prevents low-temperature issues.

How often should I change the transmission oil in my Harley?

The owner’s manual tells you to change your engine oil every 5K miles, primary every 10K and transmission every 20K. Since you’re changing your engine oil at 3K miles, you should change the primary every 6K and the transmission every 12K.

How much oil goes in a Harley transmission?

When filling the transmission, use Harley-Davidson TRANSMISSION LUBRICANT (Part No. 99892-84 (qt.) or 99891-84 (gal.)). The transmission fluid capacity is approximately 24 ounces (0.71 liters). Inspect o-ring for tears or damage.