OK let me update my run on VRP 5W30. So far I have 4 +hours worth of runtime on it in the sweltering heat of the tropics.
I bought restore and protect because I have mild oil burning issue(150ml gone every 3000km) On periods of long sitting, a start up of every week or two, the car blows blue smoke from the tail pipe on the first start of the day. I strongly suspect that my turbo drain line is partially clogged up(due to API SG oils in the 80s and 90s from the original owner in japan.), so on cold starts, the oil pressure is high, so the semi clogged drains is not allowing the oil to drain back to the sump quickly enough, that some of that oil gets pushed past the turbo seals and into the exhaust.
Once warmed up there is no smoke. Previously I used shell helix ultra 5W40, KV40 is 77cst, KV100 13cst.
1st start on R & P 5w30, there was smoke but much less. Could be because the viscosity is lower (KV40 64 KV100 10.8) that less oil is being pushed through turbo seals. I drove for about 1 1/2 hours right after OC.
Car sat for a week and I started yesterday. This time, I did not notice any smoke on start up, which was surprising. I own this car for 7 years, and It always smoked on startup after 5 days + of sitting, so I was very surprised. Could it be it cleaned the turbo passages and free up piston rings that quick, or ...could it be simply that the oil has lower viscosity causing less oil and crankcase pressure ? Also I am quite happy with the sound of the engine, there was no clacking sound from the cams eventhough this oil is thinner than the shell helix ultra. Coolant temps were about 92C. So i drove it for 2 hours plus travelling about 100+ kms. I will keep observing and will check oil level throughout this OCI, but thus far I am pleased with VRP.