[Mgs] Oil viscosity for 3.5 V8 engine
richardolindsay at gmail.com
Mon Oct 10 06:06:47 MDT 2022
Hi Dan. I do like the early cars...
On Mon, Oct 10, 2022, 7:01 AM Dan DiBiase <dan.dibiase at gmail.com> wrote:
> Rick, you need to add this one to your collection! Looks like it's in
> great shape and inexpensive....
> Dan D
> Central NJ USA
> On Sat, Oct 8, 2022 at 8:38 AM Richard Lindsay <richardolindsay at gmail.com>
>> 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
>> über-high mileage Nissan D21 pickup. Everything else/newer gets whatever
>> the Owner's Manual recommends.
>> Rick, in Houston
>> PS: Classic Plymouths are awesome.
>> On Sat, Oct 8, 2022, 2:13 AM Max Heim <mvheim at 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’s 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 at hartcom.net> <jimray at hartcom.net>
>>> 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 “Anyone used
>>> to oil pressures hovering around 70 – 75 psi on an MGB 1800 engine will be
>>> alarmed to see pressures in the Rover V8 reading 15 – 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.” 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?
>>> Thanks in advance for your input.
>>> Jim Ray
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