Hi all.
Just some advice on the topic.
I heard that mineral oils need to be either drained on the intervals reccomended by the car manufacturer or if the interval has not been reached yet, example 5000km, then it must be drained due to age on a yearly basis.
Synthetic oils apparently are not coupled on age and you can drive it for example 4 years without age affecting it.Basically you only have to look at the km it has done.
What is your thoughts of this?
I want to change to Synthetic because the Datto sees only 4000km in a year if it is lucky. So, currently I drain the mineral oil due to it's yearly age mark.
Will work out much cheaper running Synthetic for longer.

never heard of this in my life, always been told change at kms or age, which ever comes first...

Yep,,, me neither UNFAMILIA

What mineral or synthethic oils u were talking abt exactly H""...

Synthetic oils are usually heaps more expensive, and I think are all the wrong viscosity ratings for older motors. 20w50 is pretty much standard for all a series motors unless you have a specific reason or need.

I think from meomry that almost all synthetic oils are thinner eg 10w40, or 10w15 and therefore not suitable anyways.

But as far as replacement goes, unless the manufactuer specifies a longer timeframe for a motor its kms or date.

The new fords now have sealed auto boxes that never have the oil changed in them. The box is used till it fails, then it gets chucked. perhaps engines will go this way eventually?

You mean the BA\BF falcon? cos I know for a fact they replace filter pan and the oil in them. They hardley touch the auto five and six speeds though, when they got problems they're sent back to Dana or Melbourne or something

Im not sure what model, but a friend with an xr8 has just found out the hard way that his gearbox is an exchange item only. Aparently thats the way it is.

GXm, regular oil should be changed more often than once a year. Some say every three months, even if you rarely drive it. Nissan said (for the Datsun 1200) Quote: see wiki- tuneup and click the Schedule picture.

That being said, I wouldn't bother to change it but every six months.

The worst is short 1 or 2 mile trips ... it causes the oil to get lots of petrol in it.

Hey h

As u stated earlier, u hardly use the GX.
And remember friction is the highest on starting mainly.
WHat I've done was to something like DURALUBE,PROLONG or PS 23, additives on my previous datsuns and nissans.

I do know that when u do use the GX, you really hammer it...LOL....So i would recommend u change oil every 5000 Kms,,,
I use CASTROL MAGNETEC on all my vehicles,,,, No probs

We get here in ZA Synthetic called Engen Xtreme 5W-40 full synthetic.Please note that I am anyway gonna use it in my Nissan Almera as it is currently running Mobil1.
I did some research and Engen is owned by Mobil. At the back it also states that Porche approves it for their cars.
Just wanted to know if I drive less than 10 000km per year can I go over a year with the intervals.For example if I reach 10 000km in 18 months is it ok? Or must I drain at 12 months whatever the km it has done.

I guess the answer is yes you can let the oil changes go longer, but you run the risk of damaging your engine. There really is no easy meansurable way to prove either way without long term testing which is not really an option. Its just accepted wisdom from almost every manufacturer and engineer over the last few decades that leads us to this, and I trust that they have a beter understanding of the long term effects of not chnging your oil regularly.

There are plenty of stories of cars never getting an oil change in their life and they survive. I know of a VR commodore that didnt get the bonnet lifted for about 5 years straight, and it was mums taxi. Did heaps of ks and it survuived.

My dads 720 NEVER recieved a service for nearly 15 years, except when he sieezed it and we flushed the oil turned grease with diesel. It still didnt get a filter or new oil, just the secondhand stuff in the shed from my car! It still ran.. just. and he did that twice!

Put it this way. Unless you are really strapped for cash change it on sechdule and stick with the cheap mineral oil.
Thats my 2c.