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I found a faded sticker that says last change was at Valvoline oil change shop 10/25/2018 100,735 miles, 5 W20. So 1092 miles and 6 years on the oil.

2007 Hyundai Elantra GLS 101,800 miles, Unknown OCI (very black). Out: Unknown oil, VO-106 filter In: 4.5 qts SuperTech Full Synthetic 5w-30, TG9688 filter

One thing to watch out for apparently, is if you become a preferred customer there is no going back. If you ever decide you don't want to be a preferred customer any longer, then you don't get to order Amsoil online ever again--Even if you do follow a link with 515729 at the end of it. Well, I...

Originally Posted By: addyguy Silicon [snip] Check your air filter, filter housing, and ducting very carefully for leaks [snip] Did that, found nothing. I also replaced the air filter at the beginning of this oil run. I asked the shop to check it too, and they didn't find any intake leaks.

Originally Posted By: lexus114 ? Oh bugger. Didn't mean to post that, but I got too click happy. Now there doesn't seem to be any way to delete it. Sorry.

Originally Posted By: mozart I am wondering *if* synthetic oil is superior to dino for short trips and/or lots of stop and go (city) driving. Also, if the synthetic oil is superior for these applications, can you tell me why? You can assume the vehicle is in good working condition and is in the...

Long post, sorry. UOA at the bottom for the tl/dr folk. This was a very short interval between UOAs because I wanted to see if the high wear on the first one was still happening. Apparently it still is, at least it looks that way judging from the high wear metals after only 3 months. While...

OK, the VOA is up over in the VOA sub forum: O'Reilly 0W-20 Full Synthetic VOA

O'Reilly 0W-20 Full Synthetic Virgin Oil Analysis From Blackstone Labs: Quote: This is the virgin sample of O'Reilly Synthetic 0W/20 you sent, and it looks pretty good to us. As with most oil, the main additive is calcium, a detergent/dispersant, followed by phosphorus and zinc (ZDDP), which...

I picked up 5 qt of O'Reilly Full Synthetic 0W-20 today, and have a sample ready to ship out in Tuesday's mail. I'll post the VOA when I get it back.

Mobile 1 10W/30, 4450 miles on the oil. 13 months since previous change. 2000 Nissan Frontier 3.3L V6 with 52,700 miles on vehicle Daily driver, Less than a 10 mile commute plus errands, occasional longer trips on the weekends. This last winter it was parked outside, not plugged in, and...

I'd noticed that the Antifreeze was needing topped off a couple of times over the previous year, with no visible leaks, so I sent an oil sample off to Blackstone. Blackstone Comments: Quote: These 3.4L engines are known for lower intake manifold gasket issues, and that's probably what you've...