- Aug 8, 2005
- stamford, CT
Hello all:) 98 toyota corolla, 78,300 miles. ok..i had too add some oil, been using 10w30 instead of 5w30 (hot humid summer time). Pennzoil dino. The car did burn oil it seemed, for some time...about a quart in i dunno, 1,700 miles or less. Last oil change, 4-5 months ago, i added Z max. And the consumption slowed! I had tried rislone last year? 2 concentrate bottles, drove like 150 miles, drained. This time, with z max, i have noted, my cosumption went form a quart in 1,700 miles, too half a quart in 2,500 miles. Not bad.... but looking under the oil fill cap, today, i did notice...under the cap, softish wrigley looking black carbon, swirled up in a tangle ball looking thing. Looking inside the top of valve cover oil fill hole, thiers brown, too near black carbon looking coating the rim of where the cap goes on, and inside, its like 40/70...40 being clean neat visible metal, and the 70, being the brown too near black caked on appearing burnt oil crusting. I am very aware, of toyota and the smaller pistons, hence, im trying new things, too try n clean out inside, including the rings. Which i know is a challenege. The previous owners, which was my father, like 10 years ago (bought it 2nd hand with 35,000 miles on it), went too jiffy lube :x, and always had oil changed at mileage. I doubt he ever bought a quart of oil too top off what was lost/burnt. For the record, i have changed the pvc valve like 3 times since aquiring the car, 2009. I wanna try rislone, concentrate, using the sever recommendation form website..use 2 16.9 oz bottles, drive 100 miles, then drain. But i am also maybe considering, using pennzoil platinum form my stash, as pics ive seen in promotions online, show it cleaner better than mobil 1. What i wanna do, is use something known, too thoroughly clean out the rings, without having too tear down the engine. I am guessing, what i saw under the oil fill cap, is what is also on the pistons and rings...i am just assuming. So hence forth, my post. What i HAVE learned...i used too use CITGO gas, local 24 hour store. EVERY 700-900 miles, i joke you not, my oil was molases BLACK, thick, gooey, and looked as if it towed up a mountain. Recently, ive switched too a local Exxon we have here.. And over the past 2,000 miles, the oil is sitll goldenish, only just turning brown. The citgo station has bad gas or something...or as ajoke, cuttin it with water lol. Prior too exxon, went up too 2000 miles on shell 87. oil was barely even touched looking. HUGE diffference, between lower grade gas, and top tier! I tend too like dino oils. But suppose for my application, synthetic would be much better. Should i...use the rislone? And use a 16.9 oz with every oil change after? I wanna see what it does..and not sure the 2 bottles in 100 miles, or running a 16.9 for 5,000 miles would be better...or better than rislone...use mobil 1/pennzoil unltra?