If you have a 188K mileage machine, stick to dino oil and just change it
every 5K and you'll be fine. Use one of the better brands such as
Castrol or Valvoline. I think that extended use of synthetics in
internal combustion engines is counter productive because of the
extended time between oil changes.

However, synthetics in transmissions and differentials are totally in
order and I would not use anything else...

JT




YoYeahBut wrote:
>
> My mehanic claims that synthetics are very high detergent and are bad
> to start using on old engines. My 87 Accord has 188,000 miles. He
> said if it had had synthetic in it regularly before 100,000 miles it
> would be fine. He reccommends using some of that seal swelling high
> mileage stuff, but I'm hesitant to use anything that would soften the
> old seals. Also he says the Honda oil filters are probably a waste of
> money. He says he's not sure, but he knows the US aotomakers charge
> too much for their filters. Don't filters need to have ratings like
> engine oils.

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