|Topic Review (Newest First)|
|02-16-2020 04:08 PM|
If you are using any of the gasoline engine modern oils they probably have less than 800 ppm ZDDP so you'd be fine with your 1 tbsp.
|02-15-2020 09:37 AM|
|Gregory98zj||so just how much do I need to use for 7 quarts of oil.im currently using 7 tbs.so in tbs measures how much would be correct.|
|02-14-2020 06:12 PM|
A bit off topic I know.
I don't think the ZDDP is the overheating issue though. Zinc and phosphate poison the cat so it stops reacting. It just stops working.
|02-14-2020 04:05 PM|
The drop in mpgs could be due to the cat having issues. Id say spend the cash and get it swapped and we can address and additional issues then. Until then we are doing with skewd data
|02-14-2020 04:03 PM|
|Gregory98zj||MR PUDDLES. I'm 100%sure theirs something in the pipes.just a big constriction in the cat.my pipes are about 7 months old.the cat wasnt rattling or getting hot then so I only replaced the pipes and muffler.|
|02-14-2020 04:00 PM|
|Gregory98zj||SORRY that was supposed to be 1tbs per quart of zinc.so 7 tbs total.|
|02-14-2020 03:54 PM|
|Gregory98zj||I only use 1 tbs of Lucas engine break in oil addative which is zinc or zddp.|
|02-14-2020 03:52 PM|
|Gregory98zj||no it will only pull codes.im was getting around 19 to 20 mpg.now about 15.|
|02-14-2020 03:17 PM|
What zinc additive are you using? If you aren't burning much oil it shouldn't be poisoning your cats. Besides when a cat dies that way they typically just go cold not overheat. I'm just wondering if your getting into the too much zinc side of things.
Edit: If you want flow you can also just use a bigger cat. More flow area = less restriction. I put a 3" cat on my 93 and it blew through emissions here just fine.
|02-14-2020 02:56 PM|
|Mr. Puddles||Unless you are burning excessive amounts of oil Id say thats not it. What kind of mpg are you getting? Are you sure there is nothing in the exhaust and the pipe is not damaged?|
|02-14-2020 02:53 PM|
|02-14-2020 02:04 PM|
|Gregory98zj||magna flow. looking at the 2.25" Thunderbolt Catalytic Converter High Flow T409 Stainless Steel Rear O2 Nut|
|02-14-2020 02:02 PM|
|Gregory98zj||my motor has 65000 original miles on it app I use 0 that burn no oil between changes.i was looking at another type of cat than a magnaflow.|
|02-14-2020 02:00 PM|
|Gregory98zj||ok just pulled codes with friends obd11.got nothing.i use 1 tbs for every quart, so that 7 tbs of zinc.|
|02-14-2020 01:52 PM|
Originally Posted by jtec View Post
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