AMSOIL Synthetic Natural Gas Engine Oil (ANG) was developed to deliver unsurpassed
performance in natural gas engines calling for an SAE 40, low-ash (<.50%)
Performance Without Compromise
AMSOIL Synthetic Natural Gas Engine Oil’s low-ash formulation minimizes combustion
chamber deposit formation, critical in continuous operation applications. AMSOIL ANG
also significantly reduces valve recession, a common problem with other low-ash oils.
AMSOIL Synthetic Natural Gas Engine Oil is thermally stable, allowing it to combat
oxidation, oil degradation and internal deposit formation.
AMSOIL Natural Gas Engine Oil is a true straight-grade SAE 40 oil, offering maximum
protection against viscosity loss while minimizing internal oil consumption. Field
studies have reported up to a 50 percent reduction in internal oil consumption when
compared to competitive oils. Due to its synthetic formulation, AMSOIL Natural Gas
Engine Oil does not thicken as readily and qualifies as a multi-grade SAE 20W-40 oil
without the disadvantages that come with the use of viscosity improvers. This allows
the oil to be used over a broader ambient temperature range and in many cases
eliminates the need for a conventional multi-grade product.
Extended Drain Intervals
AMSOIL Natural Gas Engine Oil may be used for extended drain intervals when monitored
by an oil analysis program. Periodic oil analysis should be conducted at the engine
manufacturer’s recommended drain intervals. Change the oil filter at the recommended
engine manufacturer’s drain intervals.
AMSOIL Synthetic Natural Gas Engine Oil is compatible with conventional petroleum oils
and other synthetic lubricants; however, mixing AMSOIL Natural Gas Engine Oil with a
petroleum oil will reduce the drain interval of the AMSOIL Natural Gas Engine Oil.
Engine oil additives or after-market products are not recommended for use with AMSOIL
Natural Gas Engine Oil.
AMSOIL Synthetic Natural Gas Engine Oil is recommended for use in natural gas fueled
engines requiring low ash engine oils including the following:
• Case International
• Detroit Diesel
Note: AMSOIL Synthetic Natural Gas Engine
Oil should not be used in automotive engines that have been modified to use
propane or natural gas.