On 3 Jan , 2016, at 4:53 PM, Dennis Jowell wrote:

Dennis,
What are your thoughts in using Mobil 1 15w-50 in my Porsche 1973 -2.0 engine ? I have always used 10w -30 regular oil in it. The engine has about only about 3000 miles on it. It is a rebuilt 2.0 engine. Haven't really driven it much. My plan is to work on getting it running again in the spring. It has sat in my barn for unfortunately several years after  I rebuilt and refinished the body, the engine etc.

Dennis Jowell
Scotch Hollow Farm
Newbury, Vermont 

                DennisJ

        I would consider that Eng' to be a "NotBrokeInYet" Eng' so here is My 2cents ~ the BreakIn Routine I Adhere To ~

                For an H2OBoxer ~ Or Other OldTech Eng'

Conventional/Dino 5w30          ~       1st Hour ~ then drain it                        1000-3000RPM ~ Trying not to stay @ any 1 RPM for vary long

Conventional/Dino 5w30          ~       0 - 1000 Miles ~ then drain it          Not over 4000RPM ~ Trying not to stay @ any 1 RPM for vary long

Conventional/Dino 5w30          ~       1000 - 2000 Miles ~ then drain it              Not over 4000RPM ~ Trying not to stay @ any 1 RPM for vary long

Conventional/Dino 5w40          ~       2000 - 4000 Miles ~ then drain it              Not over 4000RPM ~ Trying not to stay @ any 1 RPM for vary long

Conventional/Dino 5w40          ~       4000 - 7000 Miles ~ then drain it              Not over 4400RPM ~ Trying not to stay @ any 1 RPM for vary long

Conventional/Dino 5w40          ~       7000 - 10000 Miles ~ then drain it      Not over 4800RPM ~ Trying not to stay @ any 1 RPM for vary long

FullSynthetic 0w40 or 5w40              ~       10000 - 14000 & every 4K after that until My OilPressureGauge tells me I might want to think about 

                                                        Upping to a *w50 or an Eng'Rebuild

                For a ModernEng' ~ Subi or TheLike ~

        Same as Above Up To             ~       2000

Conventional/Dino 5w30          ~       2000 - 4000 Miles ~ then drain it              Not over 4000RPM ~ Trying not to stay @ any 1 RPM for vary long

Conventional/Dino 5w30          ~       4000 - 7000 Miles ~ then drain it              Not over 4400RPM ~ Trying not to stay @ any 1 RPM for vary long

Conventional/Dino 5w30          ~       7000 - 10000 Miles ~ then drain it      Not over 4800RPM ~ Trying not to stay @ any 1 RPM for vary long

FullSynthetic 0w30 or 5w30              ~       10000 - 14000 & every 4K after that until My OilPressureGauge tells me I might want to think about 

                                                        Upping to a *w40 or an Eng'Rebuild

        ALSO ~ Since that Eng' HasNot been Run in a while I would Drain the OldOil Before Any Attempt to Start It Up ~

                                                                                        ORR ~ DeanB