To all people who are respected members, experts, googling experts, and the respected guests who visit these forums of Pakwheels. We are here to help each other by sharing our technical expertise which do had a background of lot and lots of R&D and practices which we learned from manufactures book and their SOP's and ground realities. We are here to help other people by guiding them in right direction on which they dont bear any kind of loss or face some kind of hassle which they does face by those street mechanics. So be straight and guide them in right directions.
And for this topic someone who argue on heat and temperature viscosity index is like a man who saws the moon and says its sun.... for example
If the temperature in your area is aroud 35-45 degrees and viscosity chart is suggesting you to go for the xx W-50 and you insist to pour the xx W-20 in your vehicle then you are a big nonsense man on universe who is denying the research done on these things and after those research these SOP's and formulas and indexes are created. If you still ignore the viscosity chart according to your area temperature than keep fooling yourself until you face those consequences. But dont implement your foolness on others and do damage to their precious vehicles and their trust.
An example of this is some one on pakwheels forum suggested a fellow member to pour 5W-30 in his toyota vitz vehicle in peak summer season and the brand was LM. After few hundred km's the oil runs out of the level all of it was consumed by the engine. He contacted me and told me every bit he has done to his car. I suggested him the correct viscosity index for his vehicle and the best brand available was LM. When I told him about the LM 15W-50 his first reaction was a straight NO as according to him LM was a fraud company thays why his previous experince was bad. But I assured him that nothing will went wrong and If some thing happens I am responsible for the loss and will pay for it. After my assurance he poured the LM 15w-50 MOS2 in his vehicle and this time not a single drop was loosed by the engine. That was due to correct tailored viscosity.
So all members who study the book of the vehicle must keep one thing in their minds that the book they are studying is for their country or weather and temperature index or it is for some other country with continuous icy season.
Of it is not for your country then follow the universal oil temperature and viscosity index amd choose the best tailored viscosity for your vehicle and keep it running longer than average engine life..... thats it and have peace
