I used Penrite full synthetic 10W50 last oil change based on others' recommendations too. I won't be using it again since the belt tensioner on cold days doesn't pump up for 3-4 seconds. The tensioner was fine before I put that stupid oil in it.
I have to say I am somewhat wary of deviating from manufacturers' recommendations when it comes to engine oil, and precisely this type of thing is why. Every morning the belt rattles. There was nothing bloody wrong with it before. I like to change my oil and filter every 5000 on this car (so I'm not a typical mechanic) and I put about 5000kms every 3 months and a change is due soon. I won't be using Penrite again (nor will I be recommending its use).
Even though I am risking deviating from the correct oilI will try a Shell 5w full synthetic for 5000kays and see what happens.
Interestingly my last car was a an R31 Skyline that I had for 6 years and the tappets always rattled at idle. Another mechanic mate told me to put Magnatec in it to shut them up. It worked! That high mileage motor used about a litre of oil per 1500kms and I only ever changed the oil once a year, so the Magnatec would get diluted pretty quickly. Off the ticking would go again. Put fresh Magnatec in it after a year and it would be fine. Went on like this for the 6 years it was mine and the four years before that when it was a customers car they just always rattled. It was a fantastically reliable car and still could be but it needs $2.5k spent on it fixing lots of small things (and a head reco with new lifters). I bought my AWD Verada and put the $2.5k towards that instead.
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Originally Posted by Victa Twin
Magna LE
