The boutique oil companies do not have approvals, so how do you know what is or isn't in there, what has or hasn't been tweaked from what's approved, and if that product still meets the requirements?
by boutique oils, if i understand correctly you mean motul 300v or redline etc,these oils are addressed to less drivers not the majority ,for a specific track or race use,so these customers dont care about approvals that much since they realise that the use is for a short time, not a long OCI. and the boutique oil company knows that and suggests that.so its a win-win deal and info.
If you service your vehicle outside the Dealer Network when under Warranty in the EU you only need to price servicing with parts of the same quality as OEM and the correctly specced oil from a VAT Registered Garage and the Warranty is valid under Block Exemption Rules.
You will not be allowed to extend your Warranty via the Manufacturers Approved Warranty Scheme and a Goodwill Repair is unlikely, which I would suggest is a good reason to have at least your scheduled maintenance done at a Main Dealer, with extra maintenance done by yourself, I do that and I had my my inlet manifolds replaced under goodwill 6 months outside of Warranty with star ship miles on my Jag XJL
first paragraph: yes its true but dealerships deny that law,yes its a law for that,and they are trying to find a small problem ,to deny the warranty bcs.you never appeared there for an OCI under the warranty period..so yes customers have the right to go outside dealer service under a warranty ,but then happens what you describe in the second paragraph, unfortunately.
you have to fight to claim that right ,send emalis to the official dealer of your city-country ,or even to the german dealer and they cant finally do anything else but accept it,yes they will accept it, but then do you trust a dealership service that you had a quarrel earlier? nope,thanks.
so they make you not to go outside from the beginning until the expire of warranty but do 1-2 OCI at their dealership.
Perhaps you should read last bullet point. PSA can refuse warranty if oil is cause of damage. They can’t if oil is approved.
The whole point of approval!
Therefore, you can use extra virgin olive oil whose blender claims that meets PSA specifications , but if it is cause of damage, good luck.
Then, it is up to dealership to either cover damage or tell customer to take a hike.
you know i remember Chris719 saying at one post ,doing the known trick ,he lets them do the OCI in their dealership under warranty but then he changes the oil with one of his own.
so my question is how will they know which oil he used if he goes under a warranty for an engine problem?
how can they prove which oil was inside the engine since chris had replaced it with another? is there a method to find out which oil he used?
i dont think they can, so they will never prove that the damage was caused by wrong oil unless you are so stupid and put valvoline instead of oil ,that you can actually tell by miles away.i don't think that they can prove by seeing an oil if its approved or not.unless they are in superman's suit and use ironman's laboratory. and guys working there ,no fence if a member works there, but they are not the most equipped mechanics .
or unless someone is truly much more stupid than the guy with the valvoline and puts virgin olive oil.but i doubt that ,since virgin oil nowadays is far more expensive than engine oil per litre