Hi guys and gals I'm newly registered to this site but i've been lurking for a while. Anyways here is my first question I have a 07 F-150 with a 4.6. I bought it new,and at 15000 mi I started using syn oil. At 27000 i put in QHP 5w20 with a motorcraft oil filter. I've never run my oil past 5000 mi. for warranty reasons. I was wondering if it would be safe to run this fill out to about 8000 mi. I drive between 60-75% hwy and most trips are more than enough to burn off condensation. To keep the warranty safe i was gonna buy some oil and a filter at wally world take it back and keep the receit. I'm a little tight with money as of now and also wouldn't mind doing "conservative long drains". So what do you all think?
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