Originally Posted By: CrAlt
Originally Posted By: jaynissan12
So far, I have used 5w-20 havoline pro DS, did fine, used 5w-30 QSUD, did fine, Castrol Mag 5w-30, did fine, Napa Syn 5w30, again did fine. I haven't noticed any difference in power, acceleration or fuel mileage when I went from 5W20 to 5W30. So far I have ran NAPA the most due to their sales before the year ended, really liking the oil. I tend to stick to semi syn or synthetic oils, just what I prefer, but I am thinking that the oil that came with it from factory was pennz yellow bottle. Choice of filter seems to matter with this engine, I hear lifter tick for a few seconds on a cold start with everything but the mopar filter. I may scale back to 5w20 again and see if I still can't notice a mpg difference.
Have you noticed any difference in sound from the w20 vs w30? The only thing I wish I could lessen with my 3.6 is the start up lifter noise after it has sat for a few days.
I wish I could find out if anything has changed in the engine design to go along with these changes over the years in the oil spec. They have VVT that uses oil and multispeed oil pumps. When they went from 5w30, 5w20 and i guess now 0w20 has anything with those systems changed?
No, this has more to do with the filter than the oil. The noise you hear is only a few seconds, telling you that the oil filter housing was dry and not primed. It doesn't matter which brand you use, that little part of it they call a check valve doesn't really seal all that well, so a day or two of not running and its clickety clack for a second. Most vehicles I have ever owned did that though if I didn't run them a day or two.
To answer your second question, the oil pump isn't tied to the VVT system that I know of, but it is a two stage pump. That thing will increase psi to 90+ with cold oil and gradually drop into the 80s, then after 156 degrees F it goes to the more open stage and settles in the 20s and 30s unless you high rev the engine. I didn't see that much pressure difference between using 5W-20 and 5W-30 to be honest. With the SN oils we have, there really isn't a whole lot of viscosity difference between the two, just the 30 having a small advantage in oil film thickness, only reason I use it with my driving habits. I mean looking at the hot viscosity of the oils, a 30w typically is around 10 and a 5w-20 is typically around 8.5, some are close to 9. So we are talking about very very little difference between the two.
Originally Posted By: jaynissan12
So far, I have used 5w-20 havoline pro DS, did fine, used 5w-30 QSUD, did fine, Castrol Mag 5w-30, did fine, Napa Syn 5w30, again did fine. I haven't noticed any difference in power, acceleration or fuel mileage when I went from 5W20 to 5W30. So far I have ran NAPA the most due to their sales before the year ended, really liking the oil. I tend to stick to semi syn or synthetic oils, just what I prefer, but I am thinking that the oil that came with it from factory was pennz yellow bottle. Choice of filter seems to matter with this engine, I hear lifter tick for a few seconds on a cold start with everything but the mopar filter. I may scale back to 5w20 again and see if I still can't notice a mpg difference.
Have you noticed any difference in sound from the w20 vs w30? The only thing I wish I could lessen with my 3.6 is the start up lifter noise after it has sat for a few days.
I wish I could find out if anything has changed in the engine design to go along with these changes over the years in the oil spec. They have VVT that uses oil and multispeed oil pumps. When they went from 5w30, 5w20 and i guess now 0w20 has anything with those systems changed?
No, this has more to do with the filter than the oil. The noise you hear is only a few seconds, telling you that the oil filter housing was dry and not primed. It doesn't matter which brand you use, that little part of it they call a check valve doesn't really seal all that well, so a day or two of not running and its clickety clack for a second. Most vehicles I have ever owned did that though if I didn't run them a day or two.
To answer your second question, the oil pump isn't tied to the VVT system that I know of, but it is a two stage pump. That thing will increase psi to 90+ with cold oil and gradually drop into the 80s, then after 156 degrees F it goes to the more open stage and settles in the 20s and 30s unless you high rev the engine. I didn't see that much pressure difference between using 5W-20 and 5W-30 to be honest. With the SN oils we have, there really isn't a whole lot of viscosity difference between the two, just the 30 having a small advantage in oil film thickness, only reason I use it with my driving habits. I mean looking at the hot viscosity of the oils, a 30w typically is around 10 and a 5w-20 is typically around 8.5, some are close to 9. So we are talking about very very little difference between the two.
