Oil query

[Freddievan]

I've bought my usual brand of oil and it's 15w-40 - Fuchs Titan Formula - but it doesn't say either mineral or synthetic on the labels.  How do I know if it's mineral?

ACEA A3/B3
API SL

[Oren Kipnis]

It really doesn't matter if it is mineral, semi synthetic or fully synthetic.
The matter is the standard the the lubricant conforms to. You specified the ACEA-Association of European Vehicle Manufacturers and API-American Petroleum Institute, but since Fuchs is a leader in lubricants, it will specify also standards and/or recommendations of leading manufacturers including Volkswagen. These are more strict then the general ACEA and API standards.
Can you upload photos of the both labels on the bottle ?

[Freddievan]

But does it matter if the oil in my engine is mineral and I top up with synthetic?  I've been advised not to do that on here and by the mechanic that I use.

I can't upload the photos of the oil container labels - I can't work out how to do this.

But Really the only other info on the container is

Fuchs recommendations:
API CG-4
FIAT 9.55535-D2/G2
MB 229.1
PSA B71 2295
VW 501 01/505 00

Engine oil for diesel and gasoline cars
Traditional high SAPS high performance engine oil
Excellent wear protection
Low oil consumption

[R0B]

This thread explains how to post pictures.
viewtopic.php?p=8351132#p8351132

[Oren Kipnis]

But does it matter if the oil in my engine is mineral and I top up with synthetic?  I've been advised not to do that on here and by the mechanic that I use.
No. It does not matter at all. All engine oils can be mixed with no worries.

I can't upload the photos of the oil container labels - I can't work out how to do this.

But Really the only other info on the container is

Fuchs recommendations:
API CG-4
FIAT 9.55535-D2/G2
MB 229.1 This is an old Mercedes Bens standard for petrol engine oils
PSA B71 2295
VW 501 01/505 00 The VW standard 501.01 is for petrol engines, and the 505.00 is for diesels. Both conform the late 80's and beginning of the 90's.

These are recommendations, thus Fuchs didn't submit samples and a lot of money for the approval of the manufacturers. On the other hand, since Fuchs is one of the leaders of lubricants in Europe, I trust their recommendation.

Engine oil for diesel and gasoline cars
Traditional high SAPS high performance engine oil
Excellent wear protection
Low oil consumption