My 1984 Jeep Cherokee just got some Western Family ND30 yesterday, about half a quart. Very close to 27,000 miles on this oil change, which started as 3 quarts Accel ND30, one quart SuperTech 5w-20 and a 2007 SuperTech oil filter. That was in 2007. ALOT has happened since then, and maby 3 quarts Various ND30 oil for Top-Off since then,.I think more like 2 1/2 quarts. Chevy 2.8V6 with 255,311 miles. Had a ChryCryCrysler 904 3 speed and NP229 Selec-Trac behind her until last week,.now has a Aisin AX-5 5 speed and NP207 Command-Trac.