25W-40 FC-W Synthetic Blend Catalyst Oil

Meets requirements of modern 4-stroke recreational engines with or without emission catalyst systems Minimizes corrosion that is formed inside the engine Meets or exceeds manufacturers recommended specs. Backed by Sierra’s Limited Lifetime Warranty. Prevents excessive thinning under extreme performance operations Capitalizing on "ZDDP" anti-wear additive technology Prevents phosphorous depletion and extends the emission catalyst life NMMA FC-W Certified/API-SL