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Phosphorous Levels
ZDDP Levels for Mobil™ Conventional Motor Oils
Hi. I have used Mobil 1™ products only in my cars for a decade. I have recently acquired a 1928 Ford Model A that only requires non-synthetic oil with 500-mile change intervals, but the engine also re...
All of our high-Zinc products are advanced full synthetic oils. As for the Zinc/Phosphorus content in Mobil Super High Mileage, we formulate this oil to meet the maximum Phosphorus content allowable t...
ZDDP Levels of Mobil Delvac
What are the current ZDDP levels for Mobil Delvac 15W-40? Is it recommended for classic engines with flat tappet camshafts?
Mobil Delvac 1300 Super 15W-40, which meets API CJ-4 performance standards, has a Phosphorus limit of 0.12 wt%.  With respect to your question on slider tappets, Mobil Delvac 1300 Super 15W-40 meets C...
Using a CJ-4 Motor Oil in a Gas Engine Having a Catalytic Converter
Is it OK to use a CJ-4 oil in a gasoline engine with a catalytic converter?
From an engine performance viewpoint, the API CJ-4 oil should provide adequate protection. But this heavy-duty viscosity grade has a higher level of phosphorus than typical ILSAC GF-5/API SN oils desi...
Break-in Motor Oil for Small Block Chevy Engine
I am looking for a break-in-oil for my small block Chevy. I have been looking at Royal Purple's break-in-oil and would like to find something less costly and that have most of the quality needed to br...
We recommend you refer to our chart that shows the various levels of antiwear (zddp) in each of our Mobil 1 products.  You’ll see there are various viscosity grades of Mobil 1 with higher levels of an...
Will Switching to a Motor Oil with More Phosphorous Adversely Impact a Ford Explorer?
I've been running Mobil 1 10W-30 in my Ford Explorer V6 SOHC for years now. Thought I would switch to Mobil 1 0W-40 for a variety of reasons. Is this oil OK with an OHC engine and will the change from...
Mobil 1 0W-40 is an outstanding product, and with the 40 grade high temperature viscosity it can help control oil consumption in higher mileage vehicles. As far as the higher phosphorus content and it...
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