Oil viscosity

[snipfer]

I drive an old Toyota Rush , mileage about 600,000km and wife drives an old beemer 318, mileage about 300,000km.
Workshop I visit always use mobil
Anyway what is a good high temp high resistance w30 oil ?

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Redline

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[andyhtc]

Most engines has acceptable range of viscosity for engine oils, and not so particular as to accept only one type. W30 or W40 are both commonly used and accepted. Doesn't make a very big diff.
Sometimes price can play a big part... W40 may be more easily found and economically viable, compared to really high quality W30 that doesn't shear as easily as other w30s.

based on butt-feel alone though... car on w30 feels lighter, while it feels smoother to me on w40

If one is keeping a car for the long term, 5w40 definitely helps.

https://www.carcareninja.com/5w30-vs-5w40/

 

[Sammiegirl00]

Pssst @Trento, I only know wd40.

 

[keenklee]

I drive an old Toyota Rush , mileage about 600,000km and wife drives an old beemer 318, mileage about 300,000km.
Workshop I visit always use mobil
Anyway what is a good high temp high resistance w30 oil ?

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IMHO, I would suggest to stay put with 5w50. You can perhaps look into EO for high mileage like Mobil 10w40 High Mileage. The concern is that if you use EO with good cleaning properties like Redline and Shell Pure Plus, after cleaning, it may cause the engine to leak.

 

[mrtanbg]

Redline

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Kum Xia

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[mrtanbg]

IMHO, I would suggest to stay put with 5w50. You can perhaps look into EO for high mileage like Mobil 10w40 High Mileage. The concern is that if you use EO with good cleaning properties like Redline and Shell Pure Plus, after cleaning, it may cause the engine to leak.

ok thanks. I guess my workshop knew what he was doing by using the mobil 15w50.

With this same rationale, can I extrapolate and say that we should not change the gear oil in our transmission if it looks ok.
After all, there had been reports that after changing a fresh gear oil, the transmission starts to act up, because it is TOO clean, it does provide the RIGHT BITE ??

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[keenklee]

ok thanks. I guess my workshop knew what he was doing by using the mobil 15w50.

With this same rationale, can I extrapolate and say that we should not change the gear oil in our transmission if it looks ok.
After all, there had been reports that after changing a fresh gear oil, the transmission starts to act up, because it is TOO clean, it does provide the RIGHT BITE ??

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ATF?
ATF should be change when it darkens, which is dependent on usage pattern.

In your scenario, if me, I will change to 5w50 and then 10w40 high mileage - within the Mobil family.

 

[liquidh]

That’s if you never ever changed your transmission fluid in 5-7 years. Then better not flush it. But if you regularly change the transmission fluid say every two years or 3-40,000km, then it’s perfectly fine to flush it.

ok thanks. I guess my workshop knew what he was doing by using the mobil 15w50.

With this same rationale, can I extrapolate and say that we should not change the gear oil in our transmission if it looks ok.
After all, there had been reports that after changing a fresh gear oil, the transmission starts to act up, because it is TOO clean, it does provide the RIGHT BITE ??

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[Sammiegirl00]

ATF?! I’m still crawling here and you’ve moved on to ATF. *smack forehead*

 

[mp4005 help]

Guys. What is this oil viscosity about or for? Passionate driver here just don’t give a toot about maintenance. *smirks*

http://www.driverstechnology.co.uk/oils.htm

 

[chrislayer]

http://www.driverstechnology.co.uk/oils.htm

Smart woman but not smart when it come to car. LOL