Can you have too much ZDDP?
If you have too much ZDDP, you start to see corrosive wear and cause another problem. Adding an excess causes the oil to become acidic, and before you know, you’re wearing cams, bearings and bushings because of too much ZDDP.
How much ZDDP do I add?
When should ZDDPlus™ be added? Anytime, but the best time is when you get the oil changed. A single 4-oz bottle is the correct concentration for a 4- to 5-quart oil change.
How much zinc is in ZDDP?
Based on the 0.94:1 ratio of phosphorus to zinc in the ZDDP molecule itself, this range of phosphorus would give a zinc level of about 1900 to 2100 ppm. As you can see from the ZDDPlusTM calculations, the zinc level when targeting the 1800-2000 ppm phosphorus mark falls in the 2400-2500 ppm range.
Can you add ZDDP to synthetic oil?
ZDDPlus is not a typical oil additive. It is compatible with all conventional and synthetic oils intended for automotive use. By adding a small 4 ounce bottle of it at every oil change, an adequate amount of Zinc and Phosphorus will continue to protect your engine.
Do older engines need zinc in the oil?
Do you need to use high-zinc motor oil in an older engine after break-in, which is typically about 500 miles? Yes, if you want to maintain horsepower and promote longevity. Even after the cam has seasoned, it’s still exposed to tremendous heat and pressure, especially in a heavily modified or racing engine.
How much ZDDP do I need for a flat tappet cam?
1,200 ppm ZDDP
There are two ways a person can ensure they are using oil that has sufficient amounts of antiwear additives, commonly listed as 1,200 ppm ZDDP for flat-tappet engines with stock valve springs and 1,400 ppm for engines with higher spring rates.
Can you put too much zinc in oil?
Is too much zinc bad for a motor?
High performance and aggressive racing engines need quite a lot more zinc than typical modern API rated oils can offer. The question is: is more zinc always better? Many may think so but – as you may have already guessed – too much zinc is also a bad thing.
Is ZDDP bad for catalytic converters?
ZDDP operates by forming a wear-protecting phosphate glass on engine surfaces in an operating engine. However, this same glass damages the engine’s catalytic converter, which is used to reduce carbon monoxide and hydrocarbon emissions that exit from the tailpipe of an operating engine.
Is synthetic oil bad for flat tappet cam?
Synthetic oils are so slippery that there is less force to turn the lifter. So, theoretically, synthetic oil could cause problems for flat-tappet cams.
Is Rotella good for flat tappet cam?
We learned that current-spec commercial-grade oil, like ROTELLA T, remains a suitable off-the-shelf lubricant for hobbyists with flat-tappet camshaft engines.
Why did they remove zinc from motor oil?
Along with harming the catalytic converter, the phosphorous in a zinc additive can produce carbon buildup in an engine’s valvetrains or bores. Today, most motor oils have reduced the amount of zinc they use dramatically.
How much ZDDP do I need for a flat-tappet cam?
When did they stop putting zinc in motor oil?
1994
As most enthusiasts should be aware, new car manufacturers reduced the level of zinc and phosphorous (also called zinc dithiophosphate, or ZDDP) in engine oil beginning in 1994. This change demanded a new oil designation from the American Petroleum Institute (API), which has now evolved to the current SN designation.
Does Shell Rotella have ZDDP?
When Rotella T6 was revised for the API specification (for use in spark ignition engines), its zinc levels were effectively reduced. Higher (content) zinc additives (ZDDP) are required for flat tappet engines and cartridge bearings, which in previous formulations Rotella T6 had desirable levels of zinc (ZDDP).
What motor oil has a high-zinc content?
For best protection, engine builders and gearheads typically use high-zinc and high-phosphorus motor oil to offer extra protection for flat-tappet cams, lifters and other components during break-in. AMSOIL Break-In Oil, for example, contains 2,200 ppm zinc and 2,000 ppm phosphorus.
Is Shell Rotella T4 high in zinc?
For classic car applications, the guys at Shell often recommend Rotella, and although it’s thought of as a diesel engine oil, its high-zinc formulation that’s made to fight scuffing on metal-to-metal contact is just what older engines need.
How much zinc does Rotella T5 have?
The answer: “Shell Rotella T Multigrade Oil SAE 15W-40 with Triple Protection Technology, our API CJ-4/SM specification product, typically contains about 1200 ppm zinc and 1100 ppm phosphorous as manufactured.”
What does the T stand for in Rotella oil?
Shell Rotella® T5 Synthetic Blend products contain Triple Protection Plus™ technology (advanced additive technology plus synthetic base oils) to protect against wear, deposits, oil breakdown, and provide better low temperature flow.
Why is Shell Rotella so good?
Shell Rotella T6 reduces ash, phosphorous, and sulfur levels to prevent blocked DPFs and increase overall efficiency. Compared to other 5W-40 formulas, Shell Rotella T6 shows 34% better wear performance. Additionally, the low viscosity synthetic base allows for an improved fuel economy durability and performance.