Thoughts on oil
- Thread starter l2015
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chrishak
New member
Mobil 1 in my 3.2. Contrary to popular belief, I don't have oil seeping from every joint, I don't burn any oil (except when started cold) and I don't have to top up between services. It's a bit rattly, but hey, it's an air-cooled 911 and it still pulls like a train.
The engine has done 116,000 miles and has never been apart
The engine has done 116,000 miles and has never been apart
Sam Quick
New member
Hi
I'm on my third year of mobile 1 and so far it's been really great, I've done circ 10,000 on each service and like the chap earlier have not had to top up between services.
The oil works well with the engine and at £40 a gallon it's very good value for the performance.
Happy motoring mate.
[8|]
I'm on my third year of mobile 1 and so far it's been really great, I've done circ 10,000 on each service and like the chap earlier have not had to top up between services.
The oil works well with the engine and at £40 a gallon it's very good value for the performance.
Happy motoring mate.
[8|]
I use Mobil Super 3000 X1 5W-40, as I'm a bit old fashioned, and not a lover of 0W oils in older engines.
Everything I have ever read has said no to Mobil 1 in these engines and as far as I can tell most indies use 10-40 semi like Shell Helix (my indie) or like JZM Castrol. I am also pretty certain that Mobil 1 is more expensive, and if changing every year why waste money an oil that you are not getting the benefit of.
There's several thread on the impact Bumpers forum about oil, its been discussed to death all with no real conclusion, it is very much a personal thing or your own/indie's preference.
my cars previous owner used Valvoline VR1 5-30w fully synthetic with no leakages and I'm currently using Millers CFS 10-40w fully synthetic on a 125k miles car dynoed at 246BHP with out dropping any oil at all.
my cars previous owner used Valvoline VR1 5-30w fully synthetic with no leakages and I'm currently using Millers CFS 10-40w fully synthetic on a 125k miles car dynoed at 246BHP with out dropping any oil at all.
Lots of mixed responses and that's why I asked the question, I've always felt that its hard to make the right choice.
It's shell helix I've been using myself for the last 3 years mark.
Undoubtedly there will be pros and cons either way I suppose the most important factor is regular changes, personally I'm only doing a couple of thousand miles a year and its always changed annually.
It's shell helix I've been using myself for the last 3 years mark.
Undoubtedly there will be pros and cons either way I suppose the most important factor is regular changes, personally I'm only doing a couple of thousand miles a year and its always changed annually.
Hello All
I use Castrol Magnatec 10W/40, the car uses about 1 litre of oil every 3500 miles. Most of it is slight leakage if the engine is hot in stationary traffic or prolonged use of high revs. It is sad but I have made accurate measurements.
I bought my car 13 years ago with 107000 miles on the clock. It had had a top end rebuild at 97000 miles and was put on Mobile 1 oil. I had read all the stuff about 0W/40 fully synthetic oils and decided when it was due for a change to go to a semi-synthetic oil. Being involved with motor cars for many years I had a compression check carried out at the next service, a 12K service at JZ Mactech. The compression results were slightly disappointing bearing in mind the previous rebuild, however, I had no concerns about the performance.
The car was put on to Castrol Magnatec. I changed the oil at the next 6K service. At the following service again a 12K at JZ Mactech I asked for the compression check to be carried out again. The results were noticably better. Speaking to Steve McHale it is our belief that the piston rings had not bedded-in properly using the Mobile 1 oil, after 12000 miles on Castrol Magnatec the sealing of the rings was improved.
The car has now done over 175000 miles and the performance is more that satisfactory and oil consumption is not a problem. I can happily recommend the use of Castrol Magnatec.
I hope this is useful to any one.
Alan Mendelson
I use Castrol Magnatec 10W/40, the car uses about 1 litre of oil every 3500 miles. Most of it is slight leakage if the engine is hot in stationary traffic or prolonged use of high revs. It is sad but I have made accurate measurements.
I bought my car 13 years ago with 107000 miles on the clock. It had had a top end rebuild at 97000 miles and was put on Mobile 1 oil. I had read all the stuff about 0W/40 fully synthetic oils and decided when it was due for a change to go to a semi-synthetic oil. Being involved with motor cars for many years I had a compression check carried out at the next service, a 12K service at JZ Mactech. The compression results were slightly disappointing bearing in mind the previous rebuild, however, I had no concerns about the performance.
The car was put on to Castrol Magnatec. I changed the oil at the next 6K service. At the following service again a 12K at JZ Mactech I asked for the compression check to be carried out again. The results were noticably better. Speaking to Steve McHale it is our belief that the piston rings had not bedded-in properly using the Mobile 1 oil, after 12000 miles on Castrol Magnatec the sealing of the rings was improved.
The car has now done over 175000 miles and the performance is more that satisfactory and oil consumption is not a problem. I can happily recommend the use of Castrol Magnatec.
I hope this is useful to any one.
Alan Mendelson
Greg James
New member
I have also used magnetic in mine for the past six years with no problems.
Nick Paul
New member
I guess its what you use your car for, how much you use it, if it already leaks and how much it burns.
A chat with OPIE oils is useful.
I currently use Millers 10w-50 and 10w-60 which seems ok and hold its pressure at high temperatures - mind you this is in a 1978 Kremer Turbo with circa 400bhp
Valvoline 10w-60 semi synthetic is also good.
I have used Mobil 1 but found the 0w-40 a bit marginal and opted for their 15w-50 which was a great oil (engine strips showed zero problems) - However, Mobil no longer supply this oil hence a switch to Valvoline and now Millers.
Its interesting that Porsche are now marketing their own branded oil and recommend a 20w-50 for up to 3000cc air cooled and 10W-60 for air-cooled above 3lt.
Whatever oil you use its worth considering laying up these cars with fresh oil in them to avoid the nasty residues eating away at your pride and joy during the winter - also avoid running the engines during layup as condensation forms inside which is not good.
In short, unless you have a high output engine most oils available today (and all previously mentioned) will be fine as long as they are changed frequently (think of it as a blood transfusion) - after all, it is the life blood of our engines!
The above is based on my experience
Hope this helps
A chat with OPIE oils is useful.
I currently use Millers 10w-50 and 10w-60 which seems ok and hold its pressure at high temperatures - mind you this is in a 1978 Kremer Turbo with circa 400bhp
Valvoline 10w-60 semi synthetic is also good.
I have used Mobil 1 but found the 0w-40 a bit marginal and opted for their 15w-50 which was a great oil (engine strips showed zero problems) - However, Mobil no longer supply this oil hence a switch to Valvoline and now Millers.
Its interesting that Porsche are now marketing their own branded oil and recommend a 20w-50 for up to 3000cc air cooled and 10W-60 for air-cooled above 3lt.
Whatever oil you use its worth considering laying up these cars with fresh oil in them to avoid the nasty residues eating away at your pride and joy during the winter - also avoid running the engines during layup as condensation forms inside which is not good.
In short, unless you have a high output engine most oils available today (and all previously mentioned) will be fine as long as they are changed frequently (think of it as a blood transfusion) - after all, it is the life blood of our engines!
The above is based on my experience
Hope this helps
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