V.I. PLUS – SAE 20w/50

Four Stroke Motorcycle Engine Oil

No. 402


  • Four stroke engines

The ultimate in multi-grade engine oil performance: V.I. Plus 20w/50 is a premium quality SJ Plus/SH crankcase oil compounded with Frontier’s exclusive extender additive package ETX. This product is superior to all other engine oils on the market for heavy-duty gasoline engines requiring a 20w/50 engine oil. This exclusive formulation provides excellent protection against deposits resulting from high temperature operation. It also provides excellent protection against sludge deposits resulting from the severe service of short trips and stop and go driving. V.I. Plus 20w/50 is specifically beneficial in v-twins and air cooled engines.


V.I. Plus 20w/50 is a blend of the highest quality base oils and selected additives. The anti-wear additive in V.I. Plus 20w/50 minimizes 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 high temperatures encountered in modern on-road and off-road driving.

V.I. Plus 20w/50 contains selected alkaline additives, which give a much higher TBN than regular SJ engine oils. This higher TBN provides much better protection against the formation of acidic compounds than conventional engine oils. It also has a much higher viscosity index than conventional oils. This benefit provides better all weather (hot or cold) performance than regular engine oil.


V.I. Plus 20w/50 Engine Oil provides the following advantages:

  • Meets or exceeds the performance requirements of current and proposed engine oil specifications
  • Protects low-emission engines from wear and deposits
  • Resists soot-related viscosity increase
  • Extends engine life while meeting emissions requirements
  • Improves engine durability, keeping equipment in as new condition


Meets and exceeds the following performance requirements: API: SJ, SH, SG


SAE GRADE: 20w/50
Viscosity @ 100ºC, cSt: 18.0
Viscosity @ 40ºC, cSt: 175
Viscosity Index: 160
Gravity, º API: 29.6
Flash Point, COC, ºF: 500
Pour Point, ºF: -15
TBN, ASTM D-2896: 10
Oxidation Stability: Exceeds Requirements
Rust and Corrosion: Exceeds Requirements
Anti-Wear Protection: Exceeds Requirements