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Re: Engine Cleaner before Synthoil?

     Don't use engine cleaner.  No need for it.  Change over to synthetic 
     with a new filter.  If dino oil deposits consern you then change it 
     again at 500mi.
     Tim NJ 90 CQ, 77Spitfire

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Subject: Engine Cleaner before Synthoil?
Author:  "Paul F. Levine" <paulevi@psd.k12.co.us> at Internet
Date:    8/6/96 1:07 PM

I've heard it said that engine cleaner should be used before using 
synthetic oil for the first time. Any comments on this, recommended 
brands, potential harmful side effects?
Also, the owners manual in my '87 5KCSTQW says basically to use 10W30 
winter and 20W50 summer. I was going to do this with the synths as well. 
I notice that Castrol and maybe others have oils like 5W50 which would  
seem to span the whole range of need. Any comment on using these wider 
range oils: ups/downs?
I live in Colorado where it can get to -20 or go up to 85 within a couple 
of days if not weeks.
Thanks again...