Mineral Oil

domtoni · Post by **domtoni** » Fri Jun 30, 2006 8:52 am

Guys,

My car is about ready for an oil change. I have used Coma classic, semi synthetic (wrong stuff), and Castrol GTX.

Is Swepco as good (gear lub) as its reputation?

Any recommendations on brand and or experience?

Thanks
Dom

hot66 · Post by **hot66** » Fri Jun 30, 2006 9:17 am

I have swepco in my box, & it deffo made a difference to the quality of teh shift, although I don't know what oil was in the box previously or how old it was either.

Engine oil ..... every year I have had a different oil in my car. I have used these fully synthetics:

Mobil1 ,
Silkolene Pro

At the moment I am running Castrol GTX.

My observations are that the car runs very slightly higher temperature with the Castrol over the other 2. I had less oil drips using the Mobil1 than the other 2 (although this is probo down to my original valve covers starting to warp slightly)

For my next oil change I think I'll be going back to Mobil1... depends how the GTX performs over the next 6 month.

domtoni · Post by **domtoni** » Fri Jun 30, 2006 9:35 am

Thanks for the input.

Dom

lacymr · Post by **lacymr** » Mon Jul 03, 2006 1:02 pm

Been using mobil 1 (0-40) for the past 6 years and its fine, though you will find leaks if the engine is not tight. Also put swepco in last year as I`ve got an LSD, a pain to put in (warm it up) was using castrol before hand.

Michael

domtoni · Post by **domtoni** » Mon Jul 03, 2006 3:14 pm

Michael,

My motor is not real tight. I will stay with mineral oil.

Thanks
Dom

hot66 · Post by **hot66** » Mon Jul 03, 2006 3:18 pm

when using Mobil1 etc .. I use the thicker grade 10/40 (if i have remembered the grade correctly

)

JonnyG · Post by **JonnyG** » Thu Jul 06, 2006 8:20 pm

I have a 93000 mile engine, no smoke one small leak, I use Castrol Classic 20/50 and Red58304 75w 90ns gear oil, the latter being fantastic on a older box, helps old synchro, take a deep breath when you see the invoice tho but worth every penny. Demon Tweaks for the gear oil, and Castrol direct

domtoni · Post by **domtoni** » Fri Jul 07, 2006 9:20 am

At days end, I bought 10 liters of Valvoline 20/50 racing oil from Chris Flavel of Stourbridge Motorsports. Gearbox oil was replaced last year and that is Mobil.

Thanks

saxon · Post by **saxon** » Sat Jul 08, 2006 7:18 pm

I use the same as jonny G like he says the red line is very good stuff no problems with the Castrol either .

timster · Post by **timster** » Thu Jul 13, 2006 1:47 pm

Like hot66, currently running Castrol GTX 10/40 and have noticed higher running temp compared with previous '76 oil'.

lacymr · Post by **lacymr** » Thu Jul 13, 2006 2:05 pm

On mobile 1 (0-40) on a 2.4S engine oil temperature is a constant 80 degrees C even during track days.

Michael

Nige · Post by **Nige** » Thu Jul 13, 2006 2:07 pm

My car's favourite tipple at the moment is Millers Classic Sport 20w50

http://www.millersoils.net/index2.html

hot66 · Post by **hot66** » Thu Jul 13, 2006 3:01 pm

domtoni wrote:At days end, I bought 10 liters of Valvoline 20/50 racing oil from Chris Flavel of Stourbridge Motorsports. Gearbox oil was replaced last year and that is Mobil.

Thanks

I used Valvoline in my 67. I can get it pretty cheap from my local tool shop.

Mike (210bhp) uses Valvoline in his 2.7RS & indicated he was very happy with it. I believe Neil Bainbridge recommended the stuff. I am now thinking of using it in my 2.4S at the next oil change

hot66 · Post by **hot66** » Thu Jul 13, 2006 3:03 pm

BTW, I only used about 350ml of castrol over the 1000 miles LeMan trip.

In 2004 I used slightly more Mobil1 on the same trip

Dr_Danger · Post by **Dr_Danger** » Fri Jul 14, 2006 3:36 pm

I haven't changed oil on my 911 yet. But I used to own a Tatra 603 with a aircooled V8 at the back, until very recently. I had great results from any modern semi-synthetic multi purpose oils which are suitable for both diesel and petrol cars. They are formulated to withstand higher teperatures in diesel engines and dramaticaly reduced my overall engine teperature. Even on hot days in traffic it would never get much above 3/4 on the teperature gauge and Tatras are known to run hot, being on the line with red zone is considered normal.