Spectro Heavy Duty Full Synthetic Oil - SYN OIL 20w50 1qt

Spectro Heavy Duty Full Synthetic 20W50 is a premium synthetic oil formulated specifically for V-twin motorcycle engines. Delivers superior wear protection, reduces oil consumption, and maintains stable viscosity across a wide temperature range.

Features

• Full synthetic formulation
• Excellent anti-wear protection
• Reduces oil consumption
• Lower operating temperatures
• Exceptional thermal and shear stability

Specifications

• Brand: Spectro
• Manufacturer Part #: 311151
• UPC: 831556003005
• Viscosity: 20W50
• Size: 1 quart
• Weight: 2.08 lbs
• Dimensions: 4 in L x 2 in W x 8.75 in H

Fitment

Fits V-twin motorcycle engines, including Harley-Davidson and Indian Motorcycle models that specify 20W50 oil.

Frequently Asked Questions

Is this synthetic oil safe for my Harley or Indian?

Yes — Spectro Heavy Duty Full Synthetic is formulated for V-twin engines and meets the needs of both air-cooled and liquid-cooled models.

What viscosity is this, and does it matter?

This is 20W50. The 20W provides cold-start flow in winter; the 50 rating handles high-temperature protection during riding. Check your owner's manual to confirm 20W50 is correct for your bike.

How often should I change this oil?

Follow your motorcycle manufacturer's service interval — typically every 2,000–5,000 miles for synthetic oil, depending on riding conditions and engine type.

Does synthetic oil last longer than mineral oil?

Yes — synthetic oil resists thermal breakdown better and typically extends drain intervals compared to conventional mineral oils.