I use Pure Power CH4 grade. I advise anyone to check into their products. Best protection I have found, A bit expensive but very hi grrade, get the specs. Very high acidity protection package to preservr bearings.
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deff got me hahaha

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Can usually get it for $16/case on sale. So, I stock up. Use Fram filters too. Never had a problem with either of these on any of our vehicles over the decades.

Originally, I changed the oil every 5000mi, but that seemed like a long time for a four banger. So, at 50,000mi I changed to every 4000mi, and now past 100,000mi I've lowered that to 3000mi. As an engine ages the blowby past the pistons increases so the oil gets dirty sooner. I often noticed with the 5000mi change period that the engine ran noticeably better immediately after the oil change. This is a sure sign that the oil needs changing at smaller intervals. It seems to me that more frequent oil changes are more important than running synthetic oil, so that's been my policy. It's cheaper too! (If you don't count the cost of your time under the car ;-) )

98.5 1.8TQM 108,000 mi and going strong.

Spam elimination is a never ending battle. I've tried about every spam-assassin/spam-eliminator/spam-whatever under the sun and find it easier to just delete spam from the inbox. You end up deleting most emails 'designated' as spam anyway.
For Anti-virus/adware/spyware protection I like either Norton/Symatec or McAfee. AV software is a bit like which chip is best so likely there will be a bazillion counter suggestions :)
If you don't have any 'protection' at all I'd start by going to an online scanner like
http://housecall.trendmicro.com/ and scan for virii. Then you could visit http://www.lavasoftusa.com/software/adaware/ and d/l Adaware SE .. It's a freebie .. not the best but the price is pretty good. Run that a couple of times to clear out anything it finds and then visit http://www.download.com/3000-8022-10227353.html and grab HijackThis. Once you've run Hijack this if you are unsure of deleting anything it finds, you can find websites with knowledgable folks who will examine the HijackThis log file and tell you what to delete and how to proceed.
Once that is all done get a copy of McAfee or Symatec installed. Each has a suite of applications in the single 'program'. Each will run a software firewall (run them in conjuction with the hardware firewall I suggest below) along with Anti-virus, Privacy and Adware programs. They will also want to run Anti-Spam software but I find them to be more of a pita than they are worth.
Lastly, I'd also advise buying and running a physical firewall (Linksys makes a good one for home use) along with the Windows and McAfee firewall ..assuming you run WinXP. The Symatec wants to control everything so it suggests allowing it to control firewall settings rather than letting WinXP enter the picture.

Was running Redline 5w30, but I had to have it shipped no one stocked it. Now running M1, 5w30