Originally Posted By: 285south
I
CAN SAY that synthetic is worth it and will brake down why.
Pix above were taking years after using synthetic to help the seals. Did not take photos before synthetic.
The first half of my car's life I was OCI at 5k. Completely Valvoline White Bottle and a 12 pack or two of Castrol GTX. The second half of life I was doing 6500 to 9k OCIs on 10w40. The highest I did was 11.3k. Never again!
Notice that my car was now consuming oil and spent the money for Valvoline SynPower 5w30. 2 months later that oil was gone because I had to top off a quart every 700 miles. Ran through the old stash of heavy 20w50 Valvoline, Valvoline 50wt Racing oil. Bought jugs of 10w40. Then Mobil 1 HM 10w40.
Started to replace one thing after the other and realized it was a design flaw of the PCV Valve.
Pics of the oil pump says
not to do more than 5k and not thicker oil than whats called for.
Now here is why synthetic is better. My oil pump
would not have been "caked" from the extended OCIs with thicker oil.
Valvoline White Bottle 5qt jug @ Walmart is $16.74. 5k miles. 300 miles per dollar
Valvoline SynPower 5qt jug @ Walmart is $26. 10k miles. 385 miles per dollar
Difference of $9.44, 5k miles, and 85 more miles per dollar.
Had I gone with Mobil Super 5K (MS5K), Mobil 1, and M1 Extended Performance(EP).
MS5K @ Walmart is 14.17. 5k miles. 355 miles per dollar
M1 @ Walmart is $25. 10k miles. 400 miles per dollar
M1EP @ Walmart is $27. 15k miles. 555 miles per dollar
And Redline I would have pushed that oil to 20k miles in stop and go city. $10 a qt, $50 total, 400 miles per dollar.
Redline is $50 for 5qts. 15k city miles. 300 miles per dollar
Redline is $50 for 5qts. 30k highway miles. 600 miles per dollar
You went 6500-9000 mile OCIs on dino with one run being 11.3? Am I reading this right?