Results 1 to 2 of 2

Thread: Swapping from mineral to synthetic oil

  1. #1
    Junior Member SHOW GUEST
    Join Date
    Mar 2009

    Swapping from mineral to synthetic oil

    Has anyone swapped from a 50 weight mineral oil to a 40 weight synthetic and seen any performance gains? I will be swapping from a 15w50 mineral to a 10w40 synthetic in my 582 BBC. Just thought i would ask the question, i have always used a 50 weight mineral in all my engines and have been told numerous times to switch to the synthetic for the frictional benefit and free HP gain. Was told around 10-15 at 7500rpm was typical.

  2. #2
    Senior Member RACING JUNKIE TheYellaBrick's Avatar
    Join Date
    Mar 2008
    Emmett, Idaho
    We use REDLINE front to rear as we are dealing with MAJOR heat buildup when it's 100+ degrees out and the engine is spinning 6,000+ for 50 to 100 miles.
    As an example of reduced friction, way back when I was into aircooled VW's and living in Denver, I filled up the transaxle with AMZOIL in the fall and as the temps dropped, I would experience only a 20 RPM drop after I'd start the engine and put it in neutral and let the clutch out. With mineral gearlube I would get a 1,000 RPM drop. :shock:
    to those who

    God Bless our folks in uniform
    "We the People, have your backs"

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
Copyright © 2005-2016 All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy