Just a small side track to state how critical is to follow the manufacturers recommendations.
My wife's 07 Beetle has an 2.5 5Cly Engine and is recommended by VW/Audi
specs 0W40 with 10,000 miles or 1 year (whichever comes 1st) changes. The crankcase holds 6 Liters; so far, no a single drama with the car. Even the dang coolant comes on different colors with a G letter and number designation. Some can be mixed, some cannot.
GM Dexcool is a great coolant, left unattended creates havoc; seen how it turns on a nasty brown goo (rust like color) that plug the radiators. Well, my 03 Impala uses Dexcool since new, 170,000 miles later, the radiator is clean as whistle. Is not rocket science, keeping the cooling system serviced properly works wonders.
Now, even the cooling system can make your lifters rattle. How? By not cooling properly heat builds up and thins the oil. Thin oil does not cushion well, therefore lifter rattle happens. Have you heard the awful sounds an overheated engine makes?
Your best source of info is in your glove box, a book called Owner's Manual, live it, learn it, know it.