Mixing edge

[Woodchukka]

Woodchukka what about hths, surlely that has to be a factor in a less powerful engine. It may not be noticeable if you have 300 rwk but 240 is not 300 so I believe it's noticeable with less power. What do you think.

As I said I can't say I have ever noticed a difference personally. I have no reason to doubt you noticing a difference. There would be some loss if the oil pressure increased as it would take more to push a higher pressure however the question is how much? Oils can lose some viscosity if they are pushed hard enough. I have experienced higher oil consumption and minor leaks when changing between brands however that returns to normal after the new oil has had a period to run in. Maybe see how if feels with a few more KM's on the oil.

[Ratsmow]

Well for those that are interested I drained 2.5 litres of edge 10w60 from my sump and added 2.5 litres of edge 0w40 today. Was very apprehensive about doing it but used like for like oils and I'm glad I did.
Went for a 150k drive mainly 100k winding roads, average fuel went from 12.4 to 11.8 l/100. Just a slight decrease in oil pressure at idle(just a tad below 3bar). Engine temp dropped a tad as well. I think the engine was livelier than before so I'm glad I did the exercise. Also there was no noticeable increase in engine noise, I think my engine is relatively quiet so happy days.

[RUN41T]

Why not just use the correct viscosity oil to begin with? Never understand people mixing oils...

[macca_779]

The guys that blend and distribute this oil are in our club. From everything I have seen, their claims are true. Club members that are using it swear by it, would never use anything else. They even offer an 'oil analysis' service. Once you have done your oil change, you send in a sample and it will get independently tested. Report shows if there are any trace elements of metals that could indicate a problem with the engine, or petrol in the oil. That kinda thing.
Much longer intervals between oil changes are recommended too. I think (but dont quote me) it is 30,000k's for a road car and 50,000k's for a diesel truck.
So all in all if seems like pretty good stuff.

For that to mean anything you would have to confirm it by going back to Mobile 1

[Ratsmow]

Why not just use the correct viscosity oil to begin with? Never understand people mixing oils...

What do you reckon the correct viscosity is? Dont tell me whats written in the owners manual. I wanted to use castrol cause it's always worked for me. I wanted to run a group 4 synthetic in a 10/50 cause it's about in the middle of what most people on here use and recommend. Castrol don't make a 10/50 so this is what I came up with. This was the only way of achieving what I wanted. I previously ran elf 10w50 which I can't get where I live anymore. 10w60 was just a bit to much for my type of use so this is a happy medium.

[IJ.]

Interesting concept but wouldn't it be easier to use the 10/50 Penrite I posted earlier?

[Ratsmow]

It would definitely be easier but I've heard so many fors and against with penrite, sludging etc., was really tempted but edge 10/60 gets the gong on here so I just wanted a thinner version. Hence the mixing. I also didn't want to swap brands cause so many guys have complained of noisy engines after swapping brands. It's worked for me so I will run with it for now.

[RUN41T]

What do you reckon the correct viscosity is? Dont tell me whats written in the owners manual. I wanted to use castrol cause it's always worked for me. I wanted to run a group 4 synthetic in a 10/50 cause it's about in the middle of what most people on here use and recommend. Castrol don't make a 10/50 so this is what I came up with. This was the only way of achieving what I wanted. I previously ran elf 10w50 which I can't get where I live anymore. 10w60 was just a bit to much for my type of use so this is a happy medium.

Is it not written in the owners manual? Do GM not pay engineers to determine the specific oil for the engine? I understand there are some variables in extreme weather conditions, However in 99% of cases the oil viscosity quoted by the manufacturer is correct.

If you are in the 1% why not get an off the shelf oil to suit instead of playing chemist with part a and part b?