V.I. Plus 5W30 is a premium quality SL/SJ engine oil designed for all-weather operation of passenger cars and light duty trucks. V.I. Plus 5W30 is a blend of the highest quality base oils and selected additives. It is compounded with Frontier’s exclusive ETX extender additive package and has a much higher viscosity index (VI) than conventional oils. This exclusive formulation provides excellent protection against deposits resulting from long term high temperature operation. V.I. Plus 5W30 anti-wear additives minimize wear and scuffing of metal surfaces under boundary lubrication conditions. The detergent-dispersant additives protect against sludge formation and varnish deposits. The anti-oxidant additive provides excellent resistance to oxidation during the higher under hood temperatures common in the high revving, high performance engines manufactured since 2001. Rust and corrosion additives protect metal parts during engine operation and shut down. V.I. Plus 5W30 provides protection against acid buildup and allows longer oil change intervals than conventional engine oils.