>In response to a recent thread, I wrote to the customer service
departments
>of several gasoline companies. So far only Chevron (No financial
interest,
>Yadda Yadda Yadda) has responded. I guess unleaded is OK under the
>"right" conditions. I'm pessimistic so I guess I'll go for the hardened
seats
>just to be sure.
>Here's their response:-
>"I am not aware of any inherent chemical properties of current unleaded
>gasoline that would prevent valve seat sink under the "right" service
>conditions in cars with valve seats that are not hardened. Nor do I
>believe that many unleaded gasolines contain an additive to compensate
>for the lack of lead. Chevron's unleaded gasolines don't. However, it
>is Chevron's belief that using unleaded gasoline in older cars with
>valve seats that are not hardened does not present a problem for most
>types of service. This is should be particularly true for the light
>service most antique sports cars see. Valve seat sink only becomes a
>risk at higher than normal engine temperatures generated by operation at
>sustained high speeds and/or loads. Please see our technical bulletin
>on the subject at www.chevron.com/chevron_root/prodserv/index.html.
>It sounds like their description, "higher than normal engine
>temperatures generated by operation at sustained high speeds and/or
>loads" pretty well sums up the normal operation of our beloved LBC's.
>So based on that, I think you made the right decision.
Thanks Andy/Joe for providing this information. I need to interject MY
personal views on this hypocritical Company that blatantly alters/impacts
wild life habitat for economic reasons and takes credit for it and
says..."buy our products, we've done good".
Apologies to anyone who works for Chevron. This is not a personal attack
aimed at you. It's a Company attack.
Ciao-
Pouya
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