Autobarn have Castrol GTX Original 20W-50 5 litre pack mineral based engine oil for only $12.99 (save $12.00).
Castrol GTX 20W-50
Extends Engine Life
in Older Vehicles
Typically pre-1990 models
Provides superior protection against
viscosity and thermal breakdown.
Keeps engines cool and clean.
Recommended for engines made
prior to 1990.
SAE 20W-50
Cheers!
bad quality oil.
last week's autobarn catalogue had a special
mobil 1
5w-50 engine oil
FULLY synthetic
$49
save $24.99
It's actually a good quality mineral based oil for older cars.
The oil you are talking about is fully synthetic of course it's better than mineral oil but it's mainly used on latest modern cars.
This oil is for older cars as in pre-1990 models which mostly ran on conventional mineral based engine oils, and for these older cars that have been mostly ran on mineral oils all their life this oil is great.
You are right Mobil 1 fully synthetic is an excellent oil but only good for the engine's that can run it, can't really use it in older cars that's why there is all different types of oils to suit all vehicles.
microsonanticirrus that is quite a statement but I doubt you know what is good or bad either way..
Your welcome mate, It's good oil and is allways around $25 at all major retailers all of the time, I allways grab a few of these when Autobarn have these sales on it's great!
thats cheap!
Actually I have used this type of oil on my newer car (Ford Falcon AU Series 1 - 2000 model) on recommendation by REPCO. Their theory was that once a car ha approx over approx. 120,000 kms then the engine has welll and truely worn in and can actually do with a thicker oil such as this, I have been taking their advice for some time now and has not caused my car any harm.
Interesting … i wonder if anyone on this site is a mechanic and can provide some professional's point of view on the whole situation.
Not saying any of you guys are wrong .. but its turned into a bit of a debate now about what is better :D
Started reading this post and thought it was time to sign up and give back a little as there's always a lot of confusion about this topic :) All car engines are designed to run on a specific viscosity (thickness of oil), you'll find this in your user manual and will notice that it changes depending on the climate (temp range, as temp influences viscosity) you live in. Specific viscosity is required as the tolerances (spaces) between moving surfaces in the engine require a certain film thickness to be lubricated well. Oil film thickness being a function of part velocity, viscosity and force. Hey you asked for it :)…
You can use synthetic or mineral in any engine as long as the manufacture's recommended viscosity is met. The difference between the two is that synthetic resists degradation through oxidation due to temp more than mineral oil. This is why you can use synthetic for twice as long. Now your oil is continuously picking up particulates which make it dirty. So if you're not running a performance engine, don’t thrash it or have a turbo then go mineral (no need for temp resistance) as you get to change it out more often thus keeping the engine oil cleaner and thus reducing engine wear. In terms of oil costs its same same, as mineral is usually half price of synthetic.
If your engine is getting old and starting to get noisy or blowing a bit of smoke then move up to a thicker oil like Penrite 25w70.
Hope that helps, soz for the essay, great deal btw :)
Thanks for the heads up. Still got 3 of them from last time but will get more.