Diesel Engine oil for petrol

Submitted: Friday, Mar 05, 2004 at 05:52
ThreadID: 11022 Views:10758 Replies:4 FollowUps:4
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Hi all..Have surplus stock of Castrol diesel engine and would like to use it on the petrol wagon. Any trouble with that? The diesel engine oil is lower viscosity but have a wider SW number.
Cheers :)
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Reply By: Member - Raymond - Friday, Mar 05, 2004 at 08:06

Friday, Mar 05, 2004 at 08:06
Hi Wil
I am sure others will correct me, but in past life driving buses, diesel oil has a high detergent content which can clean petrol engines well. Some of the drivers were stealing the oil from work (we were allowed to buy in oil at a greatly reduced cost), the boss knew, but said nothing two of the petrol engines died as a result of the oil cleaning away too much carbon,
PS I am sure someone with a diesel will swap the oil for you
AnswerID: 49228

Reply By: Big Trev - Friday, Mar 05, 2004 at 09:15

Friday, Mar 05, 2004 at 09:15
Go into the Castrol site and aske their Tech people, they are quite quick at getting back to you.

Link to Castrol
AnswerID: 49235

Follow Up By: Leroy - Friday, Mar 05, 2004 at 09:50

Friday, Mar 05, 2004 at 09:50
and then come back and let us know!!

FollowupID: 311106

Follow Up By: Wil - Tuesday, Mar 09, 2004 at 19:26

Tuesday, Mar 09, 2004 at 19:26
Hi guys

The reply I got from Castrol. Took them a while but it's good to know that anyway..

Hi Wil.
Thanks for your e-mail enquiry regarding the correct lubrication for
your Suzuki Jimny.

Castrol RX Super will destroy your catalytic converter prematurely.
As Suzuki specifies a 10W/30 oil, Castrol Magnatec would be the retail
grade required.

If you have any further enquiries, please contact the Technical Helpline
on 1300 557 998,
Mon - Fri, 8.30am - 5.00pm, ESST.


George Prapas
Technical Services Advisor
Castrol Australia
ph: 1300 557 998
fax: (03) 9268 4394

I ended up using Synthetic oil for the Jimny instead of the RX Super plus (I must add, the RX Super is fantastic for the diesel)

FollowupID: 311476

Reply By: agronomy - Friday, Mar 05, 2004 at 11:23

Friday, Mar 05, 2004 at 11:23

most of the modern oils off the shelf are multi grade multi task products which can be used in all sorts of motors. What is the product that you have on hand ? as a Castrol dealer in the Agricultural industry we can confirm if it is suitable for you petrol.


AnswerID: 49246

Follow Up By: Wil - Friday, Mar 05, 2004 at 18:18

Friday, Mar 05, 2004 at 18:18
Hi Andre

I have a 20ltr tub of RX super plus which I bought for my diesel cruiser and have recently aquired a Jimny 1.3ltr petrol. Which is due for a service.
Mate has actually put the RX super plus into his petrol cruiser before christmas and been on a big trip. His comment was the oil remain clear for a long time..??
The oil was terrific for the diesel but I wasn't sure if it was a good idea for the petrol, hence this query.



FollowupID: 311139

Follow Up By: agronomy - Friday, Mar 05, 2004 at 19:32

Friday, Mar 05, 2004 at 19:32

there is no problem with running RX super in petrol motors its a good quality all round oil as read below :

RX Super
Performance Level

SAE 15W-40, 10W-30

Castrol RX Super is a superior quality heavy duty multigrade engine oil with special additive designed to meet the requirements of turbocharged and naturally aspirated diesel engines and four stroke petrol engines.

Superior anti-wear property
Excellent dispersancy/detergency, extended engine life
Excellent oxidation resistence property
Higher sustained engine efficiencies
Applicable to all vehicles in mixed-fleet
FollowupID: 311143

Reply By: Member - Tim&jan - Friday, Mar 05, 2004 at 18:25

Friday, Mar 05, 2004 at 18:25
mate we run rx super in everything from cars to trucks to tractors this is the general oil in our work shop
AnswerID: 49299

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