Bruce,
All motor vehicle oils generally have some type of anti-foaming
additive. Excessive foaming is usually caused by overfilling the
crankcase and allowing the crankshaft to beat on the crankcase oil ..
aerating the oil in the sump. If you ever pull a side case off of the
Vmax engine .. you will not really have any oil come out at all or at
best .. very little ... you can see the crank journals and rods and
you will note that when standing they well not be whipping up the oil
.... A rear wheel drive car with the crankshaft pointing in the
direction of the vehicle travel .. will have all the oil rushing to
the rear of the crankcase and gets whipped by the rotating rod
journals because it stands up against the rear of the block ... When
hp is important you see all kinds of trap doors and scrapers to keep
this off of the crank and to carry away the oil escaping from the
journals .. when you are really serious you see dry sump oil pans ....
(of course my '67 BSA was dry sump and it wasn't that serious .. I
guess they just didn't need anymore hp loss than necessary).
As far as gears meshing ... I can assure you that the overhead cam v8
in the crown victoria I got rid of last year had a lot more gear
meshing going on than in the Vmax ... we have the secondary drive
gears but as far as the transmission we are only talking about one
pair of gears meshing at any particular time .... most cars have that
too as they have a gear on the camshaft rotating the distributor ...
etc ...
Anyhow ... rotating parts that break the surface of the oil will cause
the most foaming ... I don't think we have that problem .. I know that
the Vmax will be glad to eject any oil that gets in it's way ......
right up the rubber hose .... I know at least one person who put a
vacated glass fuel filter in the middle of this hose to eliminate that
problem, (Max throws it up .. and then it drains back down). As I
posted before ... since running synthetic .. I don't bother to fill
closer than 1/8 inch from the top fill line anymore because if I do it
will be gone by the next tank of gas ........... When I put it 1/8
from the top fill line ... it stays at that level until it is time to
change the oil again.
IMHO as always ....
campbell #95
----- Original Message -----
From: "Bruce Trimble" <[EMAIL PROTECTED]>
Subject: Re: best oil
> I heard that motorcycle oil has some additive(s)
> in it to keep the oil from foaming because on a
> motorcycle there are gears meshing unlike in a
> car and if u use car oil in a bike u will have more
> foam than oil might be why some folks overflow
> oil all the time
>
> Bruce Trimble
> VMOA 527
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