I want to step it up to a semi synth blend from shell, and whenever I as a shell Rep what oil I should use from shell and he says Pennzoil?

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RIP: 80 300SD
RIP: 79 450SEL
2002 E430 4matic (212,000km)
2002 ML500 'sport'

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FACEBOOK: PANZER450

I have been running my 450's on shell rotella 5w40 full synthetic for the last 3 years with no problems. I just love the stuff very high zddp its a diesel oil with gasoline engine certs

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61 Austin mini
67 Lotus 7
74 450sl
76 Cadillac 8.2l (501 ci)

some new cars

megasquirt conversion on:
djet 74 450sl http://www.mercdjetmegasquirt.britautorepair.com/
cis 76 450sl http://www.merccismegasquirt.britautorepair.com/

the best view is always from the point of no return

zddp is a critical additive for our older cars .how can we ascertain its addition in a synthetic oil.?
mak

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mark

all of the manufacturers have to list the zddp (Zinc dialkyldithiophosphate) as too high a concentration eats up your catalytic converter. Also remember that once your engine is run in the concentration of zddp can happily be lower than the 1200 - 1600ppm you need for run-in.
I have attached the mobil1 list for your interest they are available on all the websites (this is for mobil 1 not mobil 1 clean which has almost no zddp). most people I know use motorcycle racing oils or diesel/gasoline oils in older flat tappet cars a good website to visit is http://www.bobistheoilguy.com/cms/ as the other critical factor is oil shear - thats why I generally go for a diesel formulation - very high shear.
oil is one of those subjects that seems to get peoples blood up though so I would suggest just reading up whatever you can - once you have the oil sorted in your own head - take a look at filters - some are truly awful http://people.msoe.edu/~yoderw/oilfilterstudy/oilfilterstudy.html
you can also of course just buy zddp and add the concentrate yourself

good luck
Barri

Attached Files

Mobil_1_Product_Guide.pdf (15.7 KB, 104 views)

__________________
61 Austin mini
67 Lotus 7
74 450sl
76 Cadillac 8.2l (501 ci)

some new cars

megasquirt conversion on:
djet 74 450sl http://www.mercdjetmegasquirt.britautorepair.com/
cis 76 450sl http://www.merccismegasquirt.britautorepair.com/

the best view is always from the point of no return