Summit Industrial Products

GEO SH Gas Engine Oil Series

GEO SH Gas Engine Oil Series

Summit Synthetic SH Gas Engine Oils GEO SH-30 and GEO SH-40 are ashless and have an excellent gas engine additive package containing anti-wear agents, oxidation inhibitors and detergent-dispersants. Summit GEO SH-130 and GEO SH-140 are 100 percent full synthetic, PAO-Ester formulation with low ash, medium TBN formulations and an excellent additive package.

The end user benefits that can be anticipated with the use of Summit GEO SH Series include:

  • Fuel economy improvements
  • Engine thermal efficiency improvements
  • Horsepower improvements in BHP-hr throughout the load range
  • Oil consumption reductions
  • Cleaner engine operations & clean up of old deposits
  • Significant reductions in engine wear
  • Negligible oil degradation due to nitration while operating at lean (low O2 exhaust) conditions
  • Extended ODI 2 to 3 times beyond petroleum-based GEOs
  • Easier cold weather starting

Recommended uses

Summit Synthetic Gas Engine Oils are recommended for service in two or four cycle gas engines, naturally aspirated and turbo-charged, in all types of service.


ISO 9001

Summit first received its ISO 9001 certification in January of 1996, demonstrating a commitment to quality assurance and performance monitoring. ISO 9001 certification is an international quality standard that addresses a comprehensive list of business elements, including management responsibility, order processing, purchasing, process control, traceability, handling of non-conforming product, and internal auditing. Our present ISO 9001 certification is proof of our continuing quality commitment to our customers.


ISO 14001

Summit is committed to protecting the environment, the health and safety of our employees, customers and communities where we work and live. We recognize that through integrating sound environmental health, and safety management practices into all aspects of our business ... we can offer innovative products and services while conserving and enhancing resources for future generations.


NSF ISO 21469

ISO 21469 specifies hygiene requirements for the formulation, manufacture, use and handling of lubricants, which may come into contact with products during manufacturing or processing. The international standard applies to lubricants intended for use in food production, as well as cosmetic, pharmaceutical and animal feed industries. NSF ISO 21469 Certification by an independent, third party provides Summit with a means to obtain international acceptance for their products. 

You can see a list of Summit’s ISO 21469 certified products by clicking here.