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  • Can I top up mineral oils with synthetic oils and vice versa?

    Yes. The synthetic fluids (polyalphaolefins) used in engine oils are man made versions of mineral oil and are therefore compatible with mineral oils. In semi-synthetic formulations, mineral oils and synthetic oils are part of the same formulation. The only downside here is if you top up expensive synthetic oil with mineral oil you will be effectively diluting the advantages that such an oil will provide (good cold start, good high temperature performance and longevity).
  • What is bore glazing?

  • What is bore polishing?

  • What is detergency and dispersancy?

  • Why can't I use high detergent/dispersant oils in my classic car?

  • What's the difference between a multigrade and a monograde?

  • What are API and ACEA specifications?

  • What do the SAE Classifications mean?

  • Is there a special oil for turbochargers?

  • In my car, if I use a synthetic product, can I leave it in the engine longer?

  • What does API GL mean?

  • Is it important to select the right API GL rating?

  • What do the SAE grades mean?

  • What does EP mean?

  • Will synthetic gear oils and mineral oils mix together?

  • What is a hypoid axle?

  • Do I need a special oil for limited slip differentials?

  • Why should I choose non-EP straight oils for my classic car?

  • Is it alright to use ATF in a manual gearbox?

  • Is there one oil that will meet all of my requirements?

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