Personal Tune-up

[E-30Dubbsz]

I'd go with a 40wt.  In canada, you should be able to buy mobil delvac 1, shell rotella synthetic, both of which are 5w-40.  Petro Canana and others likely also have 5-40 oils.  

Esso XD-3 0w-40 is another EXCELLENT oil.

I'd avoid a 30wt mobil1 produc in these engines, the HT/HS ratings arent high enough, IMO, and our engines really are designed for an ACEA A3 rated oil, whereas M1 in those grades are ACEA A1/A5 (less robust, designed for different applications in other varieties of engines).

JMH

what does the grade of the oil really mean? this whole time i never knew come to think of it.

[JHZR2]

the first number has to do with cold flow properties.  each 'grade' pertains to a different test point temperature, and the oil has to fall within a certain viscosity number at that temperature to fit that grade.  The second number is its viscosity at 100C, which is relevant to operating temperature.

In reality, most ambient temperatures fall in a range where there is little difference between a 0w-, 5w-, 10w-, etc.  In fact, depending upon the temperature/viscosity behavior of the oil, a 0w- may in fact be more viscous than a 5w- or 10w- at some temperatures. This is counter-intuitive, and there is a lot of misinformation that exists.

Hope this helps!

JMH

[E-30Dubbsz]

the first number has to do with cold flow properties.  each 'grade' pertains to a different test point temperature, and the oil has to fall within a certain viscosity number at that temperature to fit that grade.  The second number is its viscosity at 100C, which is relevant to operating temperature.

In reality, most ambient temperatures fall in a range where there is little difference between a 0w-, 5w-, 10w-, etc.  In fact, depending upon the temperature/viscosity behavior of the oil, a 0w- may in fact be more viscous than a 5w- or 10w- at some temperatures. This is counter-intuitive, and there is a lot of misinformation that exists.

Hope this helps!

JMH

since im up in canada and the weather drastically changes between summer and winter shud i change to a different grade in the summer?

[E-30Dubbsz]

well a lot of people were warning me about putting synthetic in because of my high mileage at 239500km. I wanted to do some more engine work and make sure everything is in a condition that can handle synthetic. Winter is the worst time to get leaks in my opinion cause of getting stranded. so i got my oil filter with 10w-40 Quaker State Peak performance motor oil.

[JHZR2]

wife's tale to put syn in older engines and cuase issues... Ive converted 200k mile engines to syn without leakage.  All ofour 9 cars run syn, mosthave been converted between 70k and 160k miles, but 200k was successgful as well.

There are a lot of leading causes to this, but if you care about your engine, and seal swell, etc occur... wouldnt you want to fix it, rather than ignore it while running an inferior, less shear-stable and oxidation-resistant lubricant?

JMH