Development of GF-5 0W-20 Fuel-Saving Engine Oil for DLC-Coated Valve Lifters

Paper #:
  • 2014-01-1478

Published:
  • 2014-04-01
Citation:
Sagawa, T., Katayama, T., Suzuki, R., and Okuda, S., "Development of GF-5 0W-20 Fuel-Saving Engine Oil for DLC-Coated Valve Lifters," SAE Technical Paper 2014-01-1478, 2014, https://doi.org/10.4271/2014-01-1478.
Pages:
7
Abstract:
A suitable GF-5 engine oil formulation is investigated to improve the fuel economy of gasoline engines with hydrogen-free DLC-coated valve lifters. Molybdenum dithocarbamate (MoDTC) is shown to be a suitable friction modifier for low viscosity grade engine oils like 0W-20. A suitable Ca salicylate detergent is also determined from several types examined for maximizing the friction reduction effects of MoDTC. The most suitable Ca salicylate has a chemical structure capable of forming a borophosphate glass film on metal surfaces, which is known to improve the effects of MoDTC. A high viscosity index Group III base oil (VI>140) is also effective in improving fuel efficiency. It is further clarified that the structural design of the polymethacrylate viscosity modifier is another important factor in reducing engine friction.
Access
Now
SAE MOBILUS Subscriber? You may already have access.
Buy
Select
Price
List
Download
$27.00
Mail
$27.00
Members save up to 40% off list price.
Share
HTML for Linking to Page
Page URL

Related Items

Technical Paper / Journal Article
2010-04-12