Marco Mansi builds turbo Race WBX for Bugs and also many other performance engines and has done for many years so he knows his onions
Marco Mansi on Facebook wrote: Would just like to add some information about oil's that you use in your waterboxer, everyone has there own brand of oil that they like and weights of oil dependent on where they live and what they use there vanagons for, and I don't really have a preference but for one crucial thing. That one thing is ZDDP levels , I can not stress how important it is to add Camshield to your oil even if it says its high in ZDDP, if you want your WBX to live please take my advice.
937carrera wrote: alternative replacement petrol VW inline 4 engines, "Golf Gti" etc, also have flat tappets and will benefit from ZDDP.
I believe that even the CS/ JX diesels benefit as they are based on the same EA827 engine design as the petrol inline fours.
http://www.cam-shield.com/" onclick="window.open(this.href);return false;
How much to use
http://www.cam-shield.com/acatalog/How_to_use.html" onclick="window.open(this.href);return false;
Camshield website wrote: Important
This product is not for use in emissions controlled vehicles with catalytic converters, irreparable damage to the catalytic converter will result.
So not in MVs with cats
This is why the levels in all modern oils have been reduced from what they were in the 80's when this engine was produced.
Camshield website wrote: Add enough Cam-shield™ premium ZDDP concentrate to get to the appropriate concentration for that application. Current API SM/ILSAC GF-4 oils will have approximately 850 ppm Zinc.
Camshield website wrote: Minimum of 1200 to 1300 ppm Zinc for normal operation with moderate valve spring pressures (add ¼ ounce Cam-shield™ to each quart of engine oil)
If normal oil is 850ppm this is adding 350-450ppm to get to 1200-1300ppm ( see statement below that says it adds 800ppm per 1/4 oz)
or in metric terms
1/4 oz to 0.95L of oil
1.2 oz to 4.5Litres of oil
round up to 1/2 a 3oz bottle to each oil change on a WBX
Camshield website wrote: Approximately 2500 ppm Zinc for new cam/lifter break-in (add ½ ounce Cam-shield to each quart of engine oil, supplementing the cam lobe molybdenum break-in paste)
If normal oil is 850ppm this is adding 1650ppm to get to 2500ppm
1/2 oz to 0.95L of oil
2.4 oz to 4.5Litres of oil
round up to 1x 3oz bottle to each oil change on a WBX
Camshield website wrote: Cam-shield™ is the only product concentrated enough to allow you to treat for break-in or racing or normal operation.
1/4 ounce of Cam-shield™ per quart of engine oil adds 800 ppm Zinc
1/2 ounce of Cam-shield™ per quart adds 1600 ppm Zinc.
as we can see the numbers are not really adding up exactly
Marco says modern oils are lower and suggests more like 400ppm
This makes the figures above right for normal use and a bit low for breaking in
4 us quarts = approx 3.8 litres
1 us quart =0.95 litres
Camshiled one shot Break in = 3floz .....'Designed to treat 3- 4 quarts of oil' but that's or break in!
https://www.vwheritage.com/ac1093049-ca ... l-vw-spare" onclick="window.open(this.href);return false;
So if you are still reading in summary...
For normal oil changes 1/2 a 3oz bottle to each oil change on a WBX
For a standard rebuild 1x 3oz bottle to the first break in oil fill up on a WBX