Specification Comparison GF-5 vs GF-6A

Notable changes:

Piston cleanliness rate.
Engine sludge rate.
Oxidate thickening protection.
Turbo protection.
LSPI, new measures.
Fuel efficiency; avg. 1.9% in 6500 miles for GF-5 to avg. 2.9% in 10,000 miles for GF-6A