Quakerstate 5/40 synthetic from 1999 to 2010
Lucas Oil 10/30 in the new engine also synthetic

No problems at all.
Only in my race engines.


1970 Super Stock Challenger ex. Paul Rossi
1968 Dodge Dart GT 340
1968 Dodge Charger /6 3 speed manual
1966 Chrysler 300 Loaded
1968 Dodge Charger R/T 440

1968 Mini Cooper