WELCO EXTREME SERIES contains specially engineered DuraShield Boosters that help fight the main causes of engine damage. In severe testing, WELCO EXTREME SERIES with DuraShield boosters delivers up to 2 times engine life.

WELCO EXTREME SERIES is a premium multi grade motor oil formulated for passenger cars and light trucks engines requiring API performance level CI-4 under all operating conditions.

It comes under the service category of API CI-4. It has been designed by using high performance additives and high-quality base stocks to impart necessary important properties to the lubricant to perform in heavy duty engines on highway or off highways.

WELCO EXTREME SERIES with DuraShield boosters is proven in industry testing to help provide protection to your engine in two ways:

Under severe engine operating conditions soot can agglomerate to form large particles which help to displace oil on moving metal surfaces. This results in metal-to-metal contact. WELCO EXTREME SERIES with DuraShield boosters helps to prevent the agglomeration of soot as well as protecting surfaces from wear.

WELCO EXTREME SERIES with DuraShield boosters provides a protective layer on the moving metal surfaces which resists break down, even under difficult conditions.

The main causes of damage in modern engines are abrasive wear, deposits and corrosion. WELCO with Dura shield Boosters actively fights the main causes of engine damage to deliver superior protection by:

• Preventing the agglomeration of soot as well removing harmful soot particles from metal surfaces.
• Delivering improved deposit and corrosion protection by resisting thermal breakdown of oil, and by neutralizing harmful acids.
• Providing a protective film around moving metal surfaces which resists break down even under difficult conditions, maintain the film layer.