January 9, 2017 I have a 2000 Astra G. I service every 6 months. Recently, I used BG EPR® and one week later my oil is still crystal clear! I also use BG 44K®! Martyn Cheltenham, Great Britain For Automotive ProfessionalsBlog Technical Articles For Automotive Professionals For Vehicle Owners Press Releases Testimonials BG Auto Test Get the latest BG news!