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Castrol v Mobil1

L

lazza

New member
Had the car serviced yesterday at Sutton Coldfield.

Noticed that they filled up with Castrol synthetic and not the beloved Mobil 1.

Phoned the garage to query and they said they had been using Castrol for about five years, which is interesting, because I had it serviced there a couple of years back and they put Mobil1 in it!

However, they claimed it is equivalent to Mobil1 and Porsche approved.

I am not about to get it changed, or anything, but I was interested in any views on the different oils.

Lazza
 
In the handbook there is a list of specifications that oil must meet.
If the oil meets those specs, then by implication it is " Porsche approved" .

However, I stick with Mobil 1 because the marketing has convinced me [;)]
 
ORIGINAL: Alan Platt

GT One put Castrol Magnetic in my car because it's thicker and not as likely to find oil weep spots.
Click to expand...


Absolutley. Mobil 1 in an older car (forgive me!) will result in the oil constantly being renewed - by topping it up!
The synthetics are very good at finding a gap to squeeze through - and all over the driveway/garage floor/road.

I used to go through a lot of Mobil 1 in my old X1/9 - it leaked like a sieve!
 
Castrol Magnatec is not fully synthetic. The Castrol advertising says it sticks to the engine like a magnet. Considering that most car engines are made of about 90% aluminium alloys this is a pretty neat trick !!
 
That' s something I' ve always wondered about...the Magnatec marketing implies magnetic abilities, but is it actually ' proper' magnetism or rather a chemical bonding of some sort? Anyone know?
 
yes if it was truly magnetic it would all get stuck to the crank and you would never get it out!

I think they are just refering to its filming ability as they always say like a magnet - all good oils try to spread themselves over metal and hold on.

In my experience with Mini' s i found Mobil 1 was the only oil that would work well - even though I had a thermostatic oil cooler and always ran with the heater on (the joy of tuned minis ?!?).
Its what I use now in the 944 but i do use the thick stuff (mobil1 motorsport) otherwise it comes out too quickly.

Tony
 
Mark

I use Mobil 1 in my 84 3.2 which has covered 111,000 miles with no known engine work. I don' t get any oil leaks and don' t find that I need to top it up unduly. My engine shows a very healthy oil pressure and I don' t think I am harming anything other than my wallet using it?
 
Just pointing out that there are two different varieties of Mobil and Castrol.

Castrol RS 10/60
Castrol RS 0/40

Mobil 1 Motorsport 15/50
Mobil 1 0/40

I think only the 0/40 variants are available in Halfords.
 
I use Mobil 1 in my 84 3.2 which has covered 111,000 miles with no known engine work. I don' t get any oil leaks and don' t find that I need to top it up unduly. My engine shows a very healthy oil pressure and I don' t think I am harming anything other than my wallet using it?
Click to expand...

Just thought that I would add that my 87 3.2 has covered 119,000 miles, uses Mobil 1, and also has no oil leaks, with a healthy pressure - in fact, it uses less oil than when it ran on mineral oil.

So, I agree with the quote.
 
I use Mobil 1 in my 84 3.2 which has covered 111,000 miles with no known engine work. I don' t get any oil leaks and don' t find that I need to top it up unduly. My engine shows a very healthy oil pressure and I don' t think I am harming anything other than my wallet using it?
Click to expand...

I didn' t mean to imply that it was compulsory for an older engine to leak[;)]

Just that it is more likely. The oils were not so thin back then, so tollerances did not have to be so tight as they are now.

Why would any harm be done to the engine? Where did that come from?
 
Mobil 1 Motorsport 15/50
Mobil 1 0/40
Click to expand...

And in French Supermarkets Mobil 1 5/50 - for about £18 for 4 Litres.

As I never use my car in -54C temeratures I figure a low weight of 5 is low enough for me!

http://www.mobil.com/France-French/Lubes/PDS/GLXXFRPVLMOMobil1_5W-50.asp
 
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