You can't dare to go past 10,000 in 3L right, we are running 10k mark on our QG 's from half decade.
Engine is not sludgy either, its clean and shiny. And there's no compression drop. But i won't enforce on anyone to go to 10k or liquimoly... I only enforce my clients & provide them warranties, halank no ones paying me incentive from liquimoly. But reason of strong suggestions is # of vehicles and different # of brands. And if you say it will damage the engine, let me tell you it won't even damage engine at 15k km, prolonged usage will make it sludgy basically, but engine needs lubricant and its going to keep on running...
You have your own will brother, you can replace on 5k and brand of your choice im just letting you know we've always tested the extremes of everything so when someone has tested extremes they can guide you better on safety. I hope you get my point.
