Παράθεση:
Semi synth has miner oil base and synth oil in it!... the problem is you never know how much synth is in the stuff. Full synth oil is usually dearer and have higher protective qualities but still get round then engine the same as semi. Oils like Castrol EDGE and Mobil 1 are something called a "Cracked hydro carbon" so not a true synth really, very good oils with high VI numbers and Flash points.
Σημασία έχει η σωστή λίπανση. Μετά ακόμα και full synthetic να βάλεις τα πετάς κάθε 5000-6000 χιλιόμετρα ή κάθε χρόνο αν δεν καταφέρεις να γράψεις τόσα και είσαι κομπλέ.