[Shop-talk] Oil grade selection

[Richard Beels]

Same here with a couple Audi I5 (straight 5) engines in the past 
year.  These were from '88 with 200Kish miles on them.  When we owned 
them (bought both used around 50K miles each), they got Rotella 
Synthetic, changed twice a year (spring and fall) with about 6-7000 
miles between changes.  Oil pan sprang a leak on one and when I 
dropped it there was only a hint of sludge/crudge in the 
bottom.  Amazingly clean oil...

Heck, I can still see honing marks on a couple of my Stihl chainsaw 
cylinders after years of running them.  Of course, go a little lean 
and those honing marks turn to scoring marks...   :-O



At 10/22/2008 at 14:21, Shakespearean monkeys danced on Doug Braun's 
keyboard and said:
>Last spring I had to replace the head gaskets on my
>'98 Subaru, and I had a chance to inspect the cylinder
>walls.  Even after 125k miles, I could still see the
>original honing marks all around the cylinder walls,
>even in the regions where the greatest wear occurs.
>
>Also, when I checked the valve clearances, none of the
>intake valves needed any adjustment.
>
>You'd never see these things in an older engine!


Cheers!