🏁 Rev Up Your Ride with Bel-Ray!
Bel-Ray 840-1548 Thumper Synthetic Ester Blend 4T Engine Oil is a high-performance oil designed for racing engines. This 15W-50 viscosity oil provides maximum horsepower and consistent clutch performance while offering superior wear protection for critical engine components. Suitable for both air-cooled and liquid-cooled 4T engines, it’s the perfect choice for enthusiasts looking to enhance their engine's performance.
| Manufacturer | Bel-Ray |
| Brand | Bel-Ray |
| Model | Thumper Synthetic Ester Blend 4T Engine Oil 15W-50 4L |
| Item Weight | 8 pounds |
| Product Dimensions | 11 x 8 x 4 inches |
| Item model number | 840-1548 |
| Is Discontinued By Manufacturer | Yes |
| Exterior | Painted |
| Manufacturer Part Number | 840-1548 |
| OEM Part Number | 99530-B4LW |
| Viscosity | 15w-50 |
D**E
Ultimate Quality!
This oil is smooth as silk in my Yamaha Super Tenere. Would buy again without hesitation!
U**S
Bought it before ...
... will buy it again :)
M**E
Great oh,
Very good oil for mowers
K**R
I have used this oil for years and really like it!
The oil required for my 09 BMW F650GS is 15w-50 and I have used this synthetic blend oil for quite a few years. I've never had any problems with this oil and it is rated JASO MA2, so good for wet clutches as well.
M**D
Right oil for my bike
My bike needs an oil with specific properties due to a wet clutch that gets hard offroad use. Does it's job perfectly and my clutch looks perfect with zero fade at high temperature
B**N
Keeps My Thumper Thumping
I have used this oil for many years on my 18 year old air cooled Honda XR 250.I have over 80,000 miles on this dual sport trail bike, changing oil every 300-500 miles of trail use. I have rebuilt the engine 5 times, so I am getting good miles per rebuild. I doubt you will find any XR 250 with this many trail miles on it still alive. Buying this oil by the gallon helps on price per quart.
R**D
The best 4 stroke dirt bike oil.
I have used Bel-Ray, thumper oil, ever since I started riding 4 stroke's and have found it to be a superb lubricant with all of the qualities you look for in a motorcycle oil.
P**R
Oil for DRZ400
I use this in my DRZ400 based on multiple forums recommending this weight.I will say that the life of the oil - as judged by how easy it is to shift - is a little low at <1000 miles. But this only occurred after a pretty serious offroad + track incursion.It seems ok, I bet if I did an oil analysis it would either reveal that the oil I took out of my bike was still good to go or had been contaminated from all the tough stuff I went through.You can't really review oil without having an oil analysis done. The shifting feel is fine now, and the price is right.
Trustpilot
1 month ago
2 months ago