






🏍️ Ride Hard, Protect Harder – The Ultimate 4T Oil Upgrade!
Castrol Go! 10W-40 4T Motorcycle Oil is a mineral-based lubricant engineered with Trizone technology to deliver comprehensive protection across engine, clutch, and gearbox. Its high thermal and viscosity stability ensures durability under high torque and stress, while specialized additives prevent deposits and wear. Certified beyond API SG and JASO MA-2 standards, this 1-liter pack of 6 offers universal fitment for high-revving motorcycles seeking reliable, long-lasting performance.








| Viscosity | 10W-40 |
| Brand | Castrol |
| Vehicle Service Type | motorcycle |
| UPC | 079191121467 079191061039 |
| Automotive Fit Type | Universal Fit |
| Global Trade Identification Number | 00079191061039 |
| Manufacturer | Castrol |
| Size | 1 Liter |
| SAE J300 Viscosity Grade | 10W-40 |
| Model | 6103 |
| Item Weight | 12.16 pounds |
| Package Dimensions | 9.8 x 9.33 x 7.64 inches |
| Item model number | 6103 |
| Manufacturer Part Number | 06103 |
D**G
Run this in all our ATVs and my 1978 Yamaha XS1100 motorcycle - good stuff, and affordable!
I trust Castol products - I got nearly a quarter million miles on my old GMC Safari van before I scrapped it from rust. The engine and drive train were still in great shape! Use this in my off-road vehicles because it won't mess up the clutch...
P**G
This is the recommended motor oil for antique motorcycles
I have been searching for motor oil that in not only designed for motorcycles but one that is recommended for antique motorcycles. This is what has been recommended to me. I have a 1958 Harley Davidson.
K**H
Oil
Will work good enough for the pit bikes. Pricing wasn’t too bad
H**R
Fast Shipping.
As Described. Fast shipping. Expected two week shipping, received in five days (including a Sunday). Recommend. Will use again.
M**Y
Good Stuff
Showed up quickly with no issues.Will order again
R**L
Good value oil
Looked around for oil that met the requirements for my motorcycle and this one fit what I needed and was reasonably priced. Seems to work fine.
H**R
clear oil
for my old motorcycle
A**R
Castrol's the best in my book.
Decently priced. Known for being one of the best oil brands.
Trustpilot
2 weeks ago
5 days ago