15/40 castrol edge
- Thread starter bri p6b v8
- Start date
rockdemon wrote,...
Hello Rich,
In the case of 4.0 and the 4.6 as they appeared in the LR and RR, the high coolant temperature was done to keep the emissions down along with lean fuel mixtures. All this in an engine block that was never designed to run at such high temperatures.
All modern cars to my knowledge are designed to run at very high temperatures. Small radiators by comparison and thermo fans enable the engine to run hot while the fans keep the operating temperature band nice and narrow.
Ron.
Hello Rich,
In the case of 4.0 and the 4.6 as they appeared in the LR and RR, the high coolant temperature was done to keep the emissions down along with lean fuel mixtures. All this in an engine block that was never designed to run at such high temperatures.
All modern cars to my knowledge are designed to run at very high temperatures. Small radiators by comparison and thermo fans enable the engine to run hot while the fans keep the operating temperature band nice and narrow.
Ron.
Dave3066
Well-Known Member
chrisyork said:
I did just that and here's the response:
"Hi Dave
Recommendations as follows:
1963 Rover P4 110 - Golden Film SAE 30 or 20W/50 if oil pump in good condition.
1966 Rover P6 2000 TC - Golden Film SAE 20W/50
1972 Rover P6 3500S - Multivis 15W/50"
The last one is quoted as having <1.5% ZDDP in their data sheet but again no specific amount, but more than the "classic" oil they sell.
Dave
Here is a link from Mobil and their range of engine oils.
Mobil 1 15W-50 comes the closest in terms of viscosity to 20W-50 which is normally recommended for the Rover V8 running a camshaft driven oil pump. As you can see, the phosphorus is 1200PPM while the zinc is 1300PPM, which is 0.130%. This represents twice the zinc content compared to the Golden Film 20W-50 produced by Morris Lubricants. Also note that Mobil specifies this oil as being for flat tappet applications,..which is what the Rover V8 features.
http://www.mobiloil.com/USA-English/Mot ... _Guide.pdf
Ron.
Mobil 1 15W-50 comes the closest in terms of viscosity to 20W-50 which is normally recommended for the Rover V8 running a camshaft driven oil pump. As you can see, the phosphorus is 1200PPM while the zinc is 1300PPM, which is 0.130%. This represents twice the zinc content compared to the Golden Film 20W-50 produced by Morris Lubricants. Also note that Mobil specifies this oil as being for flat tappet applications,..which is what the Rover V8 features.
http://www.mobiloil.com/USA-English/Mot ... _Guide.pdf
Ron.
Barten wrote,...
Hello Barten,
By and large, mineral oil is perfectly satisfactory for the RV8, especially those running in the P6. Semi sythetic or full synthetics were recommended for the 4.0 and 4.6 litre engines in the LR / RR due to the extremely high engine running temperatures that they were subjected to in every day use.
Ron.
Hello Barten,
By and large, mineral oil is perfectly satisfactory for the RV8, especially those running in the P6. Semi sythetic or full synthetics were recommended for the 4.0 and 4.6 litre engines in the LR / RR due to the extremely high engine running temperatures that they were subjected to in every day use.
Ron.
DamianZ28
Active Member
I had comma classic 20w-50 with 1 ltr of additive for my start up after the top end rebuild, have changed it after 100 miles for this oil: http://www.joegibbsracingoil.com/produc ... 15w50.html
This is the DB's as recommended from my local garage owner, he used to run his own drag race team & has a 55 Chevy, Range Rover & 65 Chevy Alcamino usuing it, priced at £30 for 5 ltrs which isnt to bad as apposed to the cost of all my engine parts!
This is the DB's as recommended from my local garage owner, he used to run his own drag race team & has a 55 Chevy, Range Rover & 65 Chevy Alcamino usuing it, priced at £30 for 5 ltrs which isnt to bad as apposed to the cost of all my engine parts!
The Rover engine in the P6B has the greatest chance of longevity if the oil used is a 20W50 specification with sufficient quantities of ZDDP.
Ron.
Ron.
As Richard said Phil, less than or equal to 2.5%, which is pretty meaningless given that as an example 1200 parts per million of zinc and 1000 parts per million of phosphorus equates to 0.22% which is more than adeqate, so more information on that product is required.
Ron.
Ron.
Right, in very simple terms, for me only as I am easily confused. Is Millers mineral based 20w50 suitable, just their basic one not their synthetic 20w50.
Has anyone used the castrol classic 20W50 that lists zinc as being no less than .08% but no figure for the phosphorus? Castrol may be easier for me to get as I live in Swindon I think they have a depot here. Is .08% good enough?
Has anyone used the castrol classic 20W50 that lists zinc as being no less than .08% but no figure for the phosphorus? Castrol may be easier for me to get as I live in Swindon I think they have a depot here. Is .08% good enough?
Hello Phil,
Here is a link from Penrite Australia...http://www.penriteoil.com.au/images/PEN ... lletin.pdf
The zinc content is in the order of 10% more than the phosphorus level, and ideally the latter should not drop below 0.08%, so with zinc content at that level, the phosphorus is getting too low, so if it were me, I would not use the Castrol Classic 20W50.
If you can find a 20W50 oil with 0.1% phosphorus, then the zinc content will automatically be 0.11%. This is what you should try and find as a minimum!
Ron.
Here is a link from Penrite Australia...http://www.penriteoil.com.au/images/PEN ... lletin.pdf
The zinc content is in the order of 10% more than the phosphorus level, and ideally the latter should not drop below 0.08%, so with zinc content at that level, the phosphorus is getting too low, so if it were me, I would not use the Castrol Classic 20W50.
If you can find a 20W50 oil with 0.1% phosphorus, then the zinc content will automatically be 0.11%. This is what you should try and find as a minimum!
Ron.
quattro said:bri p6rover said:Hi Rich,i have always been lead to believe that a low mileage or good v8 was good to use the 15/40,i best change it and put some 20/50 in it,any suggestions wat the best make of 20/50 is cheers
I am sure that Sparky was full of a thinner oil when I got him, but after talking to a chap called Holly, the engine builder man at RPI, I changed it to Halfords Classic 20W-50 and it certainly changed the characteristics of the engine. It felt tigher, quieter, and more responsive somehow. Holly told me that they always use Valvoline (IIRC) 20W-50 in all of their Rover V8s, even brand new ones.
I am sure some have a different view, but I will always use 20/50 in mine.
Richard
I have found out it is comma tha make the halfords classic oil. it doesnt seem to have enough zdp in it!
I have added a can of wynns supercharge to mine to make up for this as I only found out after I had put it in.
Do we know if this will make up for the lack of zdp untill my next change in 3k miles?
Thanks
