[MR2] Fwd: Re: Oil Change

[Marc Medina]

Also, keep in mind that the OEM's concern is to get the car past the warranty point with as little warranty work done as possible. If it breaks after that, they hope you will just buy a new car.
  Marc

waynearndt at waynearndt.com wrote:
  


Like Bill said, lower viscosity oils let manufacturers boast better gas
mileage, but doesn't it also have to do with newer cars having smaller oil
passages? Thick oil doesn't squeeze so well through those small passages
which in turn starves the moving parts of oil. I can remember running
thicker oils in cars with high mileage though because as parts wear
tolerances increase, and the thicker oil tends to help fill in the extra
space and give a little more cushion.

-wayne




On Thu, 17 Jul 2008 19:55:45 -0700, "William Brandt"
wrote:
> Gail - the easiest advice to give as far as viscosities/weights is to go
by
> your owner's manual.
>
> On the subject of oil, there is probably no more BS, er, opinions, than
> this subject.
>
> Mechanics will say to "stay away from this brand/viscosity) because of
one
> bad experience.
>
> Everyone has their opinions.
>
> The reason the newer cars are using lower viscosities (5W030, 10W-30),
> etc) has less to do with engine requirements and more with fuel economy -
> by using thinner oils the engine has to work less hard at the expense of
> possible long term wear.
>
> For Houston with its hot steamy summers and mild winters a 20W-50 would
> probably be just fine.
>
> But check your manual. It will show you the allowable viscosity ranges
for
> your model/year.
>
> Bill
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