Re: [Amc-list] Oils

[adh@xxxxxxxxxxxxxxxxx (Sandwich Maker)]

" From: Joe Smith <know_ware@xxxxxxxxx>
" 
" Should I be using a ZDDP oil in my 63 American?  What is best?  I use Mobil 1 synthetic in my 03 Maxima. 

note: -all- oils have zddp; the difference is that oils rated to api
standards after si or ci have substantially less.  the older levels
were determined by sae experiments on engines of the late '70s.
current api std are sm and cj.  [s for spark, c for compression
ignition]

it's not as important for well-broken-in engines as new or freshly
rebuilt ones, and it doesn't matter at all if your engine doesn't have
pushrods.  still, it's cheap insurance and you have no cat to be
contaminated.  iirc mobil has a higher zddp 'old car' oil and even
higher zddp 'motorcycle' oils, in two weights, and you can add gm
'eos' or whatever they're now calling it, to any oil.  stp used to
have a red bottle 4-cyl additive which was mostly zddp with few
thickeners, but it may have been taken off the market.
________________________________________________________________________
Andrew Hay                                  the genius nature
internet rambler                            is to see what all have seen
adh@xxxxxxxxxxxxxxxxx                       and think what none thought
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