Thanks to all for the responses to my question on synthetic oil. The
overwhelming consensus is it is OK to use synthetic oil in a motor of any age
or condition, except a newly rebuilt motor. The newly rebuilt motor should be
"run -in" until the rings seat on dino juice. Then switched to synthetic.
I did buy some Mobile 1 10W30 the other day and after John Lye's comment on
Mobile 1 being only partially synthetic I reread the label. At least on the
10W30, which I believe is a new weight for Mobile 1, the label states it is
fully synthetic.
Ralph Jannelli
Charlotte NC
'72 Spitfire MKIV
'65 Spitfire MKII
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