Maybe the 10w-60 could help in this first start-up with the H22, especially during winter.

I've noticed when the H22 starts up and automatically lifts the throttle to about 2500rpm for an instant on start-up then straight away drops it back to normal cold idle speed there is a split second of cold-knock before operational oil pressure is reached and the light goes out.ģsge toyotas are shockers for this and it's commonly thought to be the demise of many an MR2 bottom-end, it's also what killed my 528 Beemer I used to have (it had a faulty anti-drain back valve). That particular viscosity was originally developed by castrol as an endurance racing oil.

The 10w-60 castrol edge sounds interesting, I know 60 grade is very high but after doing a bit of reading it has a low viscosity (10, same as 10w-30 etc) during hot running and is recommended for older multivalve engines (lets face it my H22a is 10 years old now) but with a cold viscosity of 60 it's supposed to provide excellent startup oil pressure and heavy duty cushioning when cold. Just looked on the pennzoil site, it's now called Pennzoil Platnium and is available in 0w-20, 5W-20, 5W-30, 10W-30,ĥW-40 Euro, 5W-30 Euro (not sure what the euro means) Old part number was PZ1151 although it may have been superseeded now. Maybe due to the fact it only has 300 odd km's on the block from new but still not bad considering it's a ZC. Strangly though the new boosted ZC motor in the EF7 is running the same 5w-30 Castrol Edge as the H22a and is not burning a drop. :D Replaced it with Magnatec 10w-40 and the problem basically went away. 1 litre of consumption over about 400km's. I tried the Penzoil fully-synthetic 10w-30 which Repco stocked for a brief period in my naturally asperated ZC in the EF3 and it lasted a trip to Taupo and it was gone off the dipstick completely. (come to think of it I didn't pay $75, I paid $55, $75 was the price for the two other available grades) Take a look at the price difference between the 0w-40/10w-40 and the 5w-30, the 5w-30 was about $20 cheaper last time I looked for the pack which indicates you could be onto somthing there. Yeah that post is pretty much the bible I'd forgotton about that, you worked real hard on your posts in there it should be condensed and stickied.Īfter reading through it again I noticed you picked up on the fact that Castrol R (now Castrol Edge) do not say Fully Synthetic on the 5w-30. Definitely 5W30 is too light for any DOHC VTEC.Īnd applies to the venerable ZC DOHC too.Įxcept for the B18C Non Type R, and F20B for our ambient temperatures:

Oil viscosity meaning