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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 =
really 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:
>=20
> 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 will be alarmed to see pressures in the Rover =
V8 reading 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 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 used in =
my other US built cars. Anyone have any thoughts or suggestions to this?
> =20
> Thanks in advance for your input.
> =20
> Jim Ray
> _______________________________________________
>=20
> Donate: http://www.team.net/donate.html =
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>=20
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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">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.<div =
class=3D""><br class=3D""></div><div class=3D"">50 is not too high =
viscosity for summer use in California (it=E2=80=99s really what you =
want), and 15W indicates that is not too heavy for winter use.</div><div =
class=3D""><br class=3D""><div class=3D"">
<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; -webkit-text-stroke-width: 0px; word-wrap: =
break-word; -webkit-nbsp-mode: space; -webkit-line-break: =
after-white-space;" class=3D""><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; =
-webkit-text-stroke-width: 0px; word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D""><div style=3D"margin: 0px; font-size: 13px;" =
class=3D"">--</div><div style=3D"margin: 0px; font-size: 13px; =
min-height: 16px;" class=3D"">Max Heim</div><div style=3D"margin: 0px; =
font-size: 13px;" class=3D"">'66 MGB</div></div></div>
</div>
<div><br class=3D""><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Oct 7, 2022, at 8:02 AM, <<a =
href=3D"mailto:jimray@hartcom.net"; class=3D"">jimray@hartcom.net</a>> =
<<a href=3D"mailto:jimray@hartcom.net"; =
class=3D"">jimray@hartcom.net</a>> wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><div =
class=3D"WordSection1" style=3D"page: WordSection1; caret-color: rgb(0, =
0, 0); font-family: Verdana; font-size: 13px; font-style: normal; =
font-variant-caps: normal; font-weight: normal; letter-spacing: normal; =
text-align: start; text-indent: 0px; text-transform: none; white-space: =
normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none;"><div style=3D"margin: 0in; font-size: 11pt; =
font-family: Calibri, sans-serif;" class=3D""><span style=3D"font-size: =
12pt;" class=3D"">I am puzzled about the proper oil viscosity for my =
Rover 3.5 V8 engine. Des Hammill's book<span =
class=3D"Apple-converted-space"> </span><i class=3D"">How to Power =
Tune RV8 Engines<span =
class=3D"Apple-converted-space"> </span></i>states =E2=80=9CAnyone =
used to oil pressures hovering around 70 =E2=80=93 75 psi on an MGB 1800 =
engine will be alarmed to see pressures in the Rover V8 reading 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 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 used in my other US built =
cars. Anyone have any thoughts or suggestions to this?<o:p =
class=3D""></o:p></span></div><div style=3D"margin: 0in; font-size: =
11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt;" class=3D""><o:p =
class=3D""> </o:p></span></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt;" class=3D"">Thanks in advance for your =
input.<o:p class=3D""></o:p></span></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt;" class=3D""><o:p =
class=3D""> </o:p></span></div><div style=3D"margin: 0in; =
font-size: 11pt; font-family: Calibri, sans-serif;" class=3D""><span =
style=3D"font-size: 12pt;" class=3D"">Jim Ray<o:p =
class=3D""></o:p></span></div></div><span style=3D"caret-color: rgb(0, =
0, 0); font-family: Verdana; font-size: 13px; font-style: normal; =
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normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; =
text-decoration: none; float: none; display: inline !important;" =
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