I was at 3K on my last GC run when I thought what the heck.
So I drained the filter,got the engine hot and poured in the evil Gunk.Let it idle at 1200 rpms for 30 minutes then drained hot.The oil poured out fairly clean and the filter didn't look particularly dirty.I peeped under the valve cap and did see some slight lightining of the area's where some deposits and varnish had developed.
Started a new interval with Syntec 5W-50 and a new hengst filter.The engine was very quiet and smooth which I attribute to the heavy viscosity.There was absolutely no loss in mpg's with the 5W-50 which surprised me.I actually recorded some of the best fuel economy i've gotten with this car
using the Syntec 5W-50.Wierd.
The real surprise was how quiet the lifters still were when I went to Supertech 5W30(dino stuff).I was expecting more noise but it didn't happen.
Overall i'm happy with the results.
So I drained the filter,got the engine hot and poured in the evil Gunk.Let it idle at 1200 rpms for 30 minutes then drained hot.The oil poured out fairly clean and the filter didn't look particularly dirty.I peeped under the valve cap and did see some slight lightining of the area's where some deposits and varnish had developed.
Started a new interval with Syntec 5W-50 and a new hengst filter.The engine was very quiet and smooth which I attribute to the heavy viscosity.There was absolutely no loss in mpg's with the 5W-50 which surprised me.I actually recorded some of the best fuel economy i've gotten with this car
The real surprise was how quiet the lifters still were when I went to Supertech 5W30(dino stuff).I was expecting more noise but it didn't happen.
Overall i'm happy with the results.