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All good words Max. Thanks. I didn't know about the 15W50 Mobile 1 zinc
thing.
Where I live it never really gets cold, so a constant viscosity oil
would even work. That said, I don't drive my cars enough to worry about
wear. I just play with them. My go-to oil for everything older is Castrol
GTX 20W50.
I guess I should define 'everything older'. Specifically, I mean my '53
TD, '71 Volvo 1800E, '72 MGB, '73 E-Type (V12), and even my 25-year-old
=C3=BCber-high mileage Nissan D21 pickup. Everything else/newer gets whatev=
er
the Owner's Manual recommends.
Rick, in Houston
PS: Classic Plymouths are awesome.
On Sat, Oct 8, 2022, 2:13 AM Max Heim <mvheim@sonic.net> wrote:
> I am using 15W50 in all my cars at this point: 1966 MGB, 1967 Plymouth
> slant six, 1967 Plymouth 4bbl V8; specifically, Mobil1 15W50 which is
> formulated for flat tappet engines and has 1500ppm zinc. Note that other
> weights of this brand are NOT appropriate for older cars.
>
> 50 is not too high viscosity for summer use in California (it=E2=80=99s r=
eally
> what you want), and 15W indicates that is not too heavy for winter use.
>
> --
> Max Heim
> '66 MGB
>
> On Oct 7, 2022, at 8:02 AM, <jimray@hartcom.net> <jimray@hartcom.net>
> wrote:
>
> I am puzzled about the proper oil viscosity for my Rover 3.5 V8 engine.
> Des Hammill's book *How to Power Tune RV8 Engines *states =E2=80=9CAnyone=
used to
> oil pressures hovering around 70 =E2=80=93 75 psi on an MGB 1800 engine w=
ill be
> alarmed to see pressures in the Rover V8 reading 15 =E2=80=93 40 psi. The=
se engines
> are low-pressure engines with normal pressures (hot) at 20 psi idle using=
a
> 15W 50 oil, and 40 psi over about 3500 rpm.=E2=80=9D Its time for me to =
change the
> oil in mine and 15W 50 seems a bit high when compared to oil normally use=
d
> in my other US built cars. Anyone have any thoughts or suggestions to thi=
s?
>
> Thanks in advance for your input.
>
> Jim Ray
>
>
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<div dir=3D"auto"><div>=C2=A0 =C2=A0All good words Max. Thanks. I didn'=
t know about the 15W50 Mobile 1 zinc thing.=C2=A0</div><div dir=3D"auto">=
=C2=A0 =C2=A0Where I live it never really gets cold, so a constant viscosit=
y oil would even work. That said, I don't drive my cars enough to worry=
about wear. I just play with them. My go-to oil for everything older is Ca=
strol GTX 20W50.</div><div dir=3D"auto">=C2=A0 =C2=A0I guess I should defin=
e 'everything older'. Specifically, I mean my '53 TD, '71 V=
olvo 1800E, '72 MGB, '73 E-Type (V12), and even my 25-year-old =C3=
=BCber-high mileage Nissan D21 pickup. Everything else/newer gets whatever =
the Owner's Manual recommends.</div><div dir=3D"auto"><br></div><div di=
r=3D"auto">Rick, in Houston</div><div dir=3D"auto">PS: Classic Plymouths ar=
e awesome.<br><br><div class=3D"gmail_quote" dir=3D"auto"><div dir=3D"ltr" =
class=3D"gmail_attr">On Sat, Oct 8, 2022, 2:13 AM Max Heim <<a href=3D"m=
ailto:mvheim@sonic.net">mvheim@sonic.net</a>> wrote:<br></div><blockquot=
e class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc sol=
id;padding-left:1ex"><div style=3D"word-wrap:break-word;line-break:after-wh=
ite-space">I am using 15W50 in all my cars at this point: 1966 MGB, 1967 Pl=
ymouth slant six, 1967 Plymouth 4bbl V8; specifically, Mobil1 15W50 which i=
s formulated for flat tappet engines and has 1500ppm zinc. Note that other =
weights of this brand are NOT appropriate for older cars.<div><br></div><di=
v>50 is not too high viscosity for summer use in California (it=E2=80=99s r=
eally what you want), and 15W indicates that is not too heavy for winter us=
e.</div><div><br><div>
<div style=3D"color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-=
indent:0px;text-transform:none;white-space:normal;word-spacing:0px;word-wra=
p:break-word"><div style=3D"color:rgb(0,0,0);letter-spacing:normal;text-ali=
gn:start;text-indent:0px;text-transform:none;white-space:normal;word-spacin=
g:0px;word-wrap:break-word"><div style=3D"margin:0px;font-size:13px">--</di=
v><div style=3D"margin:0px;font-size:13px;min-height:16px">Max Heim</div><d=
iv style=3D"margin:0px;font-size:13px">'66 MGB</div></div></div>
</div>
<div><br><blockquote type=3D"cite"><div>On Oct 7, 2022, at 8:02 AM, <<a =
href=3D"mailto:jimray@hartcom.net"; target=3D"_blank" rel=3D"noreferrer">jim=
ray@hartcom.net</a>> <<a href=3D"mailto:jimray@hartcom.net"; target=3D=
"_blank" rel=3D"noreferrer">jimray@hartcom.net</a>> wrote:</div><br><div=
><div style=3D"font-family:Verdana;font-size:13px;font-style:normal;font-va=
riant-caps:normal;font-weight:normal;letter-spacing:normal;text-align:start=
;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;te=
xt-decoration:none"><div style=3D"margin:0in;font-size:11pt;font-family:Cal=
ibri,sans-serif"><span style=3D"font-size:12pt">I am puzzled about the prop=
er oil viscosity for my Rover 3.5 V8 engine. Des Hammill's book<span>=
=C2=A0</span><i>How to Power Tune RV8 Engines<span>=C2=A0</span></i>states =
=E2=80=9CAnyone used to oil pressures hovering around 70 =E2=80=93 75 psi o=
n an MGB 1800 engine will be alarmed to see pressures in the Rover V8 readi=
ng 15 =E2=80=93 40 psi. These engines are low-pressure engines with normal =
pressures (hot) at 20 psi idle using a 15W 50 oil, and 40 psi over about 35=
00 rpm.=E2=80=9D =C2=A0Its time for me to change the oil in mine and 15W 50=
seems a bit high when compared to oil normally used in my other US built c=
ars. Anyone have any thoughts or suggestions to this?<u></u><u></u></span><=
/div><div style=3D"margin:0in;font-size:11pt;font-family:Calibri,sans-serif=
"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u></span></div><div styl=
e=3D"margin:0in;font-size:11pt;font-family:Calibri,sans-serif"><span style=
=3D"font-size:12pt">Thanks in advance for your input.<u></u><u></u></span><=
/div><div style=3D"margin:0in;font-size:11pt;font-family:Calibri,sans-serif=
"><span style=3D"font-size:12pt"><u></u>=C2=A0<u></u></span></div><div styl=
e=3D"margin:0in;font-size:11pt;font-family:Calibri,sans-serif"><span style=
=3D"font-size:12pt">Jim Ray</span></div></div></div></blockquote></div></di=
v></div>
</blockquote></div></div></div>
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