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Oil treatments? (Sea Foam, Lucas, etc?) V70-XC70 1998

posted by  kcookvt on  Sat Apr 24 06:44 CST 2021
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last visit: Tue Aug 5 19:59 CST 2014
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Greetings,
I have a '98 V70 base (NA) with almost 250,000 miles on it. Still runs well and has given us few problems since we bough it in '14 with 199K miles (for $1500!). I'd like to keep it going for as long as possible. I have been careful about oil changes every 5000 miles (5/30 conventional oil). The car is in Maine with my daughter: cold winters and some hot summer days). I have often wondered about the wisdom of oil and fuel system treatments and additives, such as Sea Foam or Lucas Oil stabilizer. I have seen a few videos that do not appear to be advertisements that seem to reveal some advantage to these products. I am stuck between experimental preventative maintenance using these (alone or in combination) or continuing my "if it ain't broke, don't fix it" approach.

Any thoughts about whether these products are helpful? Since I'm on the topic, what about for turbo engines (XC70 and 90 w/5 cyl turbos)? Thank you!








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    Oil treatments? (Sea Foam, Lucas, etc?) V70-XC70 1998

    posted by  james_a_sousa on  Mon Apr 26 10:41 CST 2021
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    last visit: Thu Oct 23 18:51 CST 2014
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    How about a slow change-over?

    Do an oil change with one quart od synthetic, then the next change with two quarts of synthetic, etc, until the change is full synthetic.








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    Oil treatments? (Sea Foam, Lucas, etc?) V70-XC70 1998

    posted by  KlausC on  Sat Apr 24 08:46 CST 2021
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    Sea foam in the oil does nothing. Using full synthetic will clean out any sludge, including the PCV. Remember, cold engines produce a lot of sludge, so if your daughter drives less than 15 minutes per engine start/stop and at low rpm, it means that the engine oil needs to be changed at 3000, or 5000 miles with synthetic.

    An engine is never too old to switch to synthetic.
    --
    Keeping it running is better than buying new








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      Oil treatments? (Sea Foam, Lucas, etc?) V70-XC70 1998

      posted by  kcookvt on  Sat Apr 24 12:25 CST 2021
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      last visit: Tue Aug 5 19:59 CST 2014
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      Thank you both! My next question was going to be "does it make sense to switch to synthetic for an NA car that's this old?" I have my answer. Thanks again!








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    Synthetic V70-XC70 1998

    posted by  jwalker on  Sat Apr 24 08:05 CST 2021
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    last visit: Fri Jun 6 08:39 CST 2014
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    Definitely recommend using synthetic oil in the turbo engines at a minimum. Better for the turbo. Costs more but you can extend the oil change interval out to 7-10k miles or so.

    --
    Will I buy another Volvo??? We'll see....








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    Oil treatments? (Sea Foam, Lucas, etc?) V70-XC70 1998

    posted by  derek uk on  Sat Apr 24 07:21 CST 2021
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    last visit: Fri Oct 24 12:33 CST 2014
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    I'd say if the engine is using very little oil between changes, just keep to the regular 5k intervals. You could consider changing to full synthetic but that is another question. Some of the answers to that one might overlap those to your main question.







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