I recently put in castrol gtx 5w20 into my 99 AV6 and then realized It called for 5w30, I can't tell a difference but I know I. Should have put in the recommended oil , I'll change it again before summer, but I was wondering if it can screw my car up any more than it is. (belt tensioner is ticking). Cause I can't afford a major repair.

 

5W-30 is recommended; but, 5W-20 is also acceptable for your car. See attached image.

 

The 98-00 accords called for 5w-30, and the 01-02 accords called for 5w-20. I think the 5w-20 will be fine. If you are concerned, then drain the 5w-20 and put in castrol 5w-30.

 

No worries, 5W-20 has proven to be a very robust oil; so much so that some companies (Ford for instance) have retroactively recommended 5W-20 for their older cars originally designed for 5W-30.

 

Looking at that chart, I wonder why the 99-2000 accords 5w-20 is "acceptable" and the 1998-2002 accords had the same engine...

 

Don't know for sure, but a good guess would be that in the 1999-2000 era the jury was still out on the robustness of 5W-20, by 2001 and 2002 millions of miles had been driven with that oil and it was already gaining a reputation as well suited for use in U.S. cars.

 

 

5W-20 is also acceptable for a 98 Accord.

The guides are published showing a range of 15 years. I've attached an older guide that which includes 98.

 

I agree with all the above post's..

Welcome New Member

 

Interesting picture on the death of Windows XP. I used that OS and loved it for many years, and when Windows Vista came out I tried to love it as well; didn't happen, ended up hating it more than Windows ME. The laptop I bought in 2008 came with Vista and after I found that OS literally unusable, I down-graded it to Windows XP; unfortunately the drivers for power and thermal management were not available for XP and the darned thing overheated itself into the trash bin.

When Windows 7 was announced I rushed out and bought a business class laptop which offered a $100 down grade to XP and was thrilled at how well that system ran. Unfortunately my main client was forced from on high to convert my group to Windows 7 and so I used my personal laptop as my learning test bed. Guess what? I liked it; a lot! With the addition of Classic Shell I got the best of the Explorer navigation features I like from XP, and the best of Windows 7 including the far superior IP communications stack.

Windows 8? Don't get me started.