From: larry moe 'n curly on


badgolferman wrote:
>
> My two Toyotas (97 Camry 4, 2000 Sienna) recommend 5W-30 oil for the
> engine. The 2002 Ford Escort I bought for my son recommends 5W-20
> grade oil. I live in SE Virginia where it gets hot during the summer
> but not too cold in winter. What are the ramifications of using 5W-20
> or 5W-30 in all vehicles? Would the 5W-20 oil get past leaky seals
> easier?

I doubt it will leak any more than the 10W-30 Vavoline synthetic I
used in my 1998 Frontier. I switched back to conventional 5W-30, and
the leaks stopped in a few days. Valvoline said viscosity doesn't
matter nearly as much as slipperiness when it comes to leaks, and
synthetic is slipperier.

I'm in Phoenix, where 110F in the summer isn't unusual, and a few days
each year will reach 115F. 5W-20 seems to work fine in Hondas
specified for it; I'm not familiar with other cars using that
viscosity.