Engine & Internal Chat about beefing up your engine's insides here.

previous owner never changed oil?

  #2  
Old 08-31-2009, 10:00 AM
Join Date: Aug 2009
Location: Fort Erie, ON
Posts: 6
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I would be hesitant to do a quick engine flush. The guys on BITOG seem to really like Auto-Rx but I've never tried it. Synthetic oils also seem to do a good job with cleaning sludge. Pennzoil Platinum is another BITOG favourite and claims to have good detergency. Heavy Duty Engine Oils (HDEOs) generally have stronger detergents than Starburst oils. The main differences between Starburst Oils and HDEOs is that HDEOs contain higher levels of phosphorus (anti-wear additive) and no friction modifiers (for 1-2% improved fuel economy).

I would just use a good engine oil and initially stay within the recommended oil change intervals recommended by my owner's manual.
 

Last edited by 91AccordEXR; 01-22-2017 at 01:53 PM. Reason: Link Update
  #3  
Old 08-31-2009, 10:43 AM
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Join Date: May 2006
Location: Wisconsin
Posts: 17,502
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The oil in the pan gets pretty well-mixed when you drive. So I wouldn't think the stratification means that it was never changed.

But just in case he was correct about the presence of sludge in the bottom of the pan, I'd change oil now. Then change it AGAIN when you get home. At that time, take a wire or coathanger or something, & poke it into the drain hole. Root around the bottom of the pan to check for sludge.

If you see sludge, then do the Auto-RX stuff. I've never used it myself, but I've seen good reports about it.
 
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