Post Number: 190
|Posted on Thursday, 26 February, 2015 - 05:56: |
I've always used Castrol Clasic XL 20W50 mineral oil to my satisfaction.
Recently, when in the UK I picked up a couple of cans of Halfords 20W50 as it was much cheaper. The oil has a green colour where the Castrol has the more usual golden shade.
The trouble started when I changed the oil and filter. When starting from cold my '79 Shadow has always produced a small whisp of blue smoke which quickly dissapeared. The car consumes a bit of oil but certainly nothing out of the ordinary.
However since using the Halfords oil the blue smoke is now very noticeable and follows the car for the first few miles. Also oil consmption is now much higher.
Has anyone experienced the same ? Is it possible that Halfords oil is inferior and causes these symptons ? Or is it just a coincidence and does the car have some other problems ?
richard george yeaman
Post Number: 260
|Posted on Thursday, 26 February, 2015 - 06:40: |
Hi Benoit you will have to go back to where you were to find the answer it is probably the old adage you get what you pay for.
Post Number: 1539
|Posted on Thursday, 26 February, 2015 - 07:01: |
Interesting as I have had a similar experience over the last 12 months with my diesel 4WD using two different grades of engine oil from the same manufacturer.
When using their "Silver" 15W-40 multigrade oil, exhaust smoke when the engine was under load was more obvious and oil consumption was consistently 1 litre in 5000kM.
After changing to their "Gold" 15W-40 multigrade when the "Silver" multigrade oil was discontinued, exhaust smoke was immediately less obvious and no change in the engine oil level has been evident at the subsequent scheduled changes after 5000kM of use.
It is my opinion this experience validates the old Castrol slogan "oils ain't oils" as this confirms there is a relationship between oil quality and oil consumption presumably associated with the additives and their quality used by the manufacturer as observed by my recent experience of over 50,000kM using the higher grade oil.
I doubt if you have a problem with your car other than the use of inferior quality engine oil.