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Hybrid Vehicles Toyota Prius Mobil 1 and Slick 50?
18 messages, Last post on Apr 10, 2009 at 10:50 AM
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I just purchased a 2007 Prius and have previously used both synthetic oil and Slick 50 to increase gas mileage in American cars. Does anyone have any experience or suggestions as to the use of either of these in future Prius oil changes?
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Replying to: green55 (Mar 10, 2007 10:21 pm) Slick 50 had to change their formulation and reports I've read say it no longer provides much benefit. |
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My subject says it all... 
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I just bought an 05 tbird and I usually use Mobil 1 synth. oil in my vehicles. The owners manual calls for 5w-20. What weight of Mobil 1 should I use as I don't think it comes in 5w-20? Also, what is the best method or product for cleaning and protecting the convertible top. My top is a light blue or grey color. Thanks
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| Snake oil, that sums up SLick 50. Never use additives in new engines, they are NOT needed. Using Mobil 1 has all the additives you will ever need. Slick willy sells SLick 50. Case in point, had a 79 LTD wagon, I rebuilt the engine myself, and used Castrol GTX 10W30 in it. I put 300,000 miles on that engine, never once using an additive in it, just plain Castrol GTX. The car gave out, then engine did not. I pulled the engine and put it in another car, in the process I had to swap the oil pan, so just for kicks, I popped the bearing caps and plastigauged the journals. They were still in specs, and clean. If you stick with the recommended 5K oil change and use a good filter and good oil, you will NEVER have the need to add anything to the oil, dont waste your money on slick willy 50. | |
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Replying to: thundrjet (Mar 15, 2007 6:10 am) |
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i used to use it but it is not API or ILSAC certified...mobil 1 is excellent oil and slick 50 would dilute it...i would use wal mart oil at 1.50 a qt (2.99 for syn, a great deal) over slick 50 anyday...wm oil is also GM 6094M approved, not all oil is...someone made a good point about oil companies spending God knows how many millions of dollars researching their products opposed to slick 50s budget...automakers dont reccomend it
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Replying to: chetj (Apr 07, 2007 7:37 am) Just use Mobil 1, which is a good synthetic oil, or if you're really enthusiastic, try Royal Purple. I think it's the "better" type of synthetic. From reading several forums it appears use of synthetic will not result in measurable fuel economy increases in the Prius. Perhaps any improvement is buried in the "noise" of background variations. 
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True, no increase for MPG will be seen with Mobil 1 in the Prius, and you really wont see any in any other car for that matter, this isnt the reason to use a synthetic. The true purpose of a syn is much better protection than any dino oil. Over time Dino breaks down in all factors, additive packaged, lubricity, holding suspension etc. Synthetics can last much longer in Lubricity and suspension, two key factors in the use of oil. Lubricity to keep the parts free moving, and suspension to carry the waste particle of combustion to the filter where it is removed. In addition, the additive packages last longer due to the properties of the synthetic blends. The additives help bind to the metal parts, adding to their life span. Zinc is one of them, ZInc is a babbit material on bearings, and having zinc in the oil helps deter from the wear(at least that was how it was explained to me in class, ASE Cert) that occurs. With Dino, the lubricity goes away after time, due to the compressions the molecules go through with each rev of the crank, Synthetics have more resistance to breaking down from compression. What Mobil 1 can do for the prius is extend the oil life from 5000 miles to 10000 miles with just a filter change at 5000 and topping off the oil. Some guys who have diesels have a bypass filtration system installed and change their oil every 15-25K miles with nothing my oil changes every 5K miles and topping off the oil. Big savings when you have 4 gallons of oil to change out, but not realy that much with the prius.
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Replying to: acdii (Apr 07, 2007 11:13 am) Don't get me started on the silly "fuel efficient" oils (5W30) the Pathfinder came with new. Warm engine, idling, I hear rumbling (oil film breakdown - crankshaft touches bearings). Never heard it again once I switched to 10W30 (proper viscosity) oil. Sometimes people think too hard. |
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