Did a Motorflush with GUNK motorflush and change oil WOW!

[bigborian]

Originally Posted by yimmy149

I was responding to your engine temp comments - 210 is too high.

Temp stays close to 180 after switching to 10w-40, the issue wasn't the radiator it was light weight oil with solvents in it breaking down the oil

[coreseller]

Dumb question on a month old thread.....out of curiousity, did you only put in ONE quart of Gunk motor flush? If so, how did you drain out only one quart of oil?

[FTD]

My first thought is "10W/30"!?!? Yikes. Isn't that risky? Doesn't the engine require 0 - 5W/40 - 50, even if for a short interval? Don't know, that's why I'm asking. Just seems kinda risky.

[2K3_Boxster_S]

Originally Posted by FTD

My first thought is "10W/30"!?!? Yikes. Isn't that risky? Doesn't the engine require 0 - 5W/40 - 50, even if for a short interval? Don't know, that's why I'm asking. Just seems kinda risky.

my thoughts as well. Why is everyone recommending 10w this and 10w that when Boxsters come from the factory with 5w-40?

[mptoledo]

Originally Posted by 2K3_Boxster_S

my thoughts as well. Why is everyone recommending 10w this and 10w that when Boxsters come from the factory with 5w-40?

I was told the "10" was for the climate you live. I live in Ohio and it starts getting cold well, like right frickin now, , If you live in Florida, arizona and other year round hot spots then you wouldn't want a "10" w40 but more like a 5 or less w 40

[blue2000s]

Careful using just the rating numbers as a means in which to decided what climates to use an oil. The first number is tested at 100F, the second at 210F. The numbers are only representative of the viscosities at those temperatures. At 0F, a 5W-40 could conceivably have a lower viscosity than a 0W-40. I've seen it happen, in fact. The viscosity/temperature relationship isn't always linear in an automotive motor oil.

212 is closer to where engines run on the high side, so it's safer to directly compare the 40 rating with the 30.

[Blue-S]

Originally Posted by 2K3_Boxster_S

my thoughts as well. Why is everyone recommending 10w this and 10w that when Boxsters come from the factory with 5w-40?

My 2000 Boxster S owner's manual lists 10w40 synthetic among the acceptable oil choices. Porsche has migrated to 0w40 and 5w40 more recently in order to (supposedly) improve fuel economy. The whole auto industry is moving to 5w and 0w oils for that reason. That doesn't mean that I have to do so, though.

[mptoledo]

Originally Posted by coreseller

Dumb question on a month old thread.....out of curiousity, did you only put in ONE quart of Gunk motor flush? If so, how did you drain out only one quart of oil?

You have to drain all the oil out (complete change). Preferably while its still hot as when oil cools it allows the "gunk" to settle out of the oil (not good). You will probably also need to change your oil in another 500 to 1000 miles to get any residuals out of it, just to be safe. I have been considering this, but I have just changed my oil with expensive castro syntech. I will probably use a cheaper 5w40 oil for the 500 to 1000 miles as It will be immediately wasted. Then I will put some castro back in and change it every year or 5k miles.

After all that, it will still be cheaper than going to a "stealership" for their $150 coffee.

Lubro Moly has a motor flush, which is supposedly designed for German cars since they are a German chemical company, so take that for what it's worth.

Due to the amount of and effectiveness of the solvents in this products, it's a pretty good idea to follow the flush with a short interval oil change to avoid the long term problems of running with a thinned lubricant.