DaveyB
New member
Hi,
Having had my car serviced at Porsche (where they over filled it), I now need to top it up. They used Mobil 1 0w50. But as I have had a number of smokey start ups, I thought it wise to follow some advice and use 5w40 oil instead to top it up.. I assume you can top up with a different grade as long as they are both fully synthetic? And do I have to use a Mobil 1 5w40 (where I've heard this is sold as a diesel engine oil)?
Having had my car serviced at Porsche (where they over filled it), I now need to top it up. They used Mobil 1 0w50. But as I have had a number of smokey start ups, I thought it wise to follow some advice and use 5w40 oil instead to top it up.. I assume you can top up with a different grade as long as they are both fully synthetic? And do I have to use a Mobil 1 5w40 (where I've heard this is sold as a diesel engine oil)?