At 191k should I stick with Fully Synthetic oil?

[PINBALL]

Have always been a great believer in using the best oil possible, which was borne out in my recently part exchanged Volvo (B200E) 740 that had 270k on the clock & semi synth oil changed regularly at 5k intervals.

Trouble was that engine was outlasting the rest of the car that was falling to pieces with excessive wear all around it!

Have been told that changing from full synth to semi would'nt make a great deal of difference (except in the wallet), and that seals in the engine block would or may start to leak after a time, particularly as engine is now approaching the 200,000 threshold!

So what do you experts have to say on this dilemma?

All comments gratefully recieved.

Regards,
Keith.

 

[Myros]

there is a great deal of truth

in what you hear. However, it's all proof of the pudding type stuff. Your seals will only leak if they are going to leak, and you'll only know if you make the change. At 200k I'd be tempted to leave well alone, as it obviously ain't broke. The cost of fully synth need not be crippling though. I have made the change on both my C and SL (90k and 120k, full oil flush before changing, one short mileage change , and then normal routine) and 4 litres of Chevron 5w-40 only sets me back £11 plus vat at Costco.

try this link for info
http://www.chris-longhurst.com/carbibles/index.html?menu.html&engineoil_bible.html

 

[PINBALL]

Many Thanks for usefull comment & link Myros

I will stick to fully synth.
Just covered 3,000 mls since buying 6 wks ago & oil/water levels havn't moved!