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F20A fully synthetic oil?

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    F20A fully synthetic oil?

    This week, I ordered a box of tune-up parts from Autodoc for the recently purchased CB3.

    Out of clue about the last oil change, and out of a user's manual for the car, I went to the local scamstore and picked up whatever they recommended for it. Drained the oil and realized they gave me fully synthetic oil.

    Is this okay to use in the CB3, or should it be replaced with semi-synthetic?

    Thanks

    #2
    Well of course you drained all the old oil out correct and replaced the filter. Then synthetic oil would be just fine there is still some residual oil which means it won't be a fully synthetic oil when those 2 mixed together but there will be no problem when those 2 mixed together. Just don't fall for the trip of extended oil life and think you don't have to change the oil according to the manufacturer's recommended oil change time. If you look at the inside of these engines how they are Brown looking that is because people do not change the oil in the recommended intervals by the manufacture of the motor and they believed it the engine oil manufacturers recommendation is it good enough. When my engine was rebuilt by Honda of Japan I got scolded for not changing my oil as I was supposed to even though I did do the proper time or mileage there was still some slight Browning marks on the head and of course the Japanese people believe that everything should be perfect so I got scolded for that

    Comment


    • q4rspwn
      q4rspwn commented
      Editing a comment
      Thanks for the reply

      Yes, I'm more the paranoid type, wasting too much on oil changes (quite hard to get perfect results without knowledge, though..). The airbox label says oil should be changed every 10,000 km (6,200 miles), it however only took me 3 months, or about 7,500 km, between first and second change. Oil still looked new, despite a happy right foot and a 3-day April road trip.

      According to the shop, however, the recommendation is fully synthetic Castrol Edge 0W30. That should be for "new cars under heavy trim levels". I find this weird, since none of my pre-2000 cars have been recommended to go fully synthetic to begin with. The '87 M102 Benz even had mineral oil as the recommendation...
      Last edited by q4rspwn; 05-04-2021, 12:20 PM.
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